diff --git a/Cargo.lock b/Cargo.lock
index 555285f..6a905c0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "KIT-ILIAS-downloader"
 version = "0.2.14"
@@ -25,9 +27,9 @@ dependencies = [
 
 [[package]]
 name = "adler"
-version = "0.2.3"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee2a4ec343196209d6594e19543ae87a39f96d5534d7174822a3ad825dd6ed7e"
+checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
 [[package]]
 name = "aho-corasick"
@@ -49,9 +51,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.38"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "afddf7f520a80dbf76e6f50a35bca42a2331ef227a28b3b6dc5c2e2338d114b1"
+checksum = "28b2cd92db5cbd74e8e5028f7e27dd7aa3090e89e4f2a197cc7c8dfb69c7063b"
 
 [[package]]
 name = "async-compression"
@@ -112,15 +114,15 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.6.0"
+version = "3.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "099e596ef14349721d9016f6b80dd3419ea1bf289ab9b44df8e4dfd3a005d5d9"
+checksum = "63396b8a4b9de3f4fdfb320ab6080762242f66a8ef174c49d8e19b674db4cdbe"
 
 [[package]]
 name = "byteorder"
-version = "1.4.2"
+version = "1.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae44d1a3d5a19df61dd0c8beb138458ac2a53a7ac09eba97d55592540004306b"
+checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
 
 [[package]]
 name = "bytes"
@@ -130,9 +132,9 @@ checksum = "b700ce4376041dcd0a327fd0097c41095743c4c8af8887265942faf1100bd040"
 
 [[package]]
 name = "cc"
-version = "1.0.66"
+version = "1.0.67"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c0496836a84f8d0495758516b8621a622beb77c0fed418570e50764093ced48"
+checksum = "e3c69b077ad434294d3ce9f1f6143a2a4b89a8a2d54ef813d85003a4fd1137fd"
 
 [[package]]
 name = "cfg-if"
@@ -157,15 +159,21 @@ dependencies = [
 
 [[package]]
 name = "const_fn"
-version = "0.4.5"
+version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28b9d6de7f49e22cf97ad17fc4036ece69300032f45f78f30b4a4482cdc3f4a6"
+checksum = "076a6803b0dacd6a88cfe64deba628b01533ff5ef265687e6938280c1afd0a28"
+
+[[package]]
+name = "convert_case"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6245d59a3e82a7fc217c5828a6692dbc6dfb63a0c8c90495621f7b9d79704a0e"
 
 [[package]]
 name = "cookie"
-version = "0.14.3"
+version = "0.14.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "784ad0fbab4f3e9cef09f20e0aea6000ae08d2cb98ac4c0abc53df18803d702f"
+checksum = "03a5d7b21829bc7b4bf4754a978a241ae54ea55a40f92bb20216e54096f4b951"
 dependencies = [
  "percent-encoding",
  "time",
@@ -199,9 +207,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.1"
+version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02d96d1e189ef58269ebe5b97953da3274d83a93af647c2ddd6f9dab28cedb8d"
+checksum = "e7e9d99fa91428effe99c5c6d4634cdeba32b8cf784fc428a2a687f61a952c49"
 dependencies = [
  "autocfg",
  "cfg-if",
@@ -237,10 +245,11 @@ dependencies = [
 
 [[package]]
 name = "derive_more"
-version = "0.99.11"
+version = "0.99.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "41cb0e6161ad61ed084a36ba71fbba9e3ac5aee3606fb607fe08da6acbcf3d8c"
+checksum = "f82b1b72f1263f214c0f823371768776c4f5841b942c9883aa8e5ec584fd0ba6"
 dependencies = [
+ "convert_case",
  "proc-macro2",
  "quote",
  "syn",
@@ -254,9 +263,9 @@ checksum = "212d0f5754cb6769937f4501cc0e67f4f4483c8d2c3e1e922ee9edbe4ab4c7c0"
 
 [[package]]
 name = "dtoa"
-version = "0.4.7"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88d7ed2934d741c6b37e33e3832298e8850b53fd2d2bea03873375596c7cea4e"
+checksum = "56899898ce76aaf4a0f24d914c97ea6ed976d42fec6ad33fcbb0a1103e07b2b0"
 
 [[package]]
 name = "dtoa-short"
@@ -282,15 +291,6 @@ dependencies = [
  "cfg-if",
 ]
 
-[[package]]
-name = "error-chain"
-version = "0.12.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d2f06b9cac1506ece98fe3231e3cc9c4410ec3d5b1f24ae1c8946f0742cdefc"
-dependencies = [
- "version_check",
-]
-
 [[package]]
 name = "flate2"
 version = "1.0.20"
@@ -311,9 +311,9 @@ checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
 [[package]]
 name = "form_urlencoded"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ece68d15c92e84fa4f19d3780f1294e5ca82a78a6d515f1efaabcc144688be00"
+checksum = "5fc25a87fa4fd2094bffb06925852034d90a17f0d1e05197d4956d3555752191"
 dependencies = [
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  "percent-encoding",
@@ -331,9 +331,9 @@ dependencies = [
 
 [[package]]
 name = "futures"
-version = "0.3.12"
+version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da9052a1a50244d8d5aa9bf55cbc2fb6f357c86cc52e46c62ed390a7180cf150"
+checksum = "a9d5813545e459ad3ca1bff9915e9ad7f1a47dc6a91b627ce321d5863b7dd253"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -346,9 +346,9 @@ dependencies = [
 
 [[package]]
 name = "futures-channel"
-version = "0.3.12"
+version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2d31b7ec7efab6eefc7c57233bb10b847986139d88cc2f5a02a1ae6871a1846"
+checksum = "ce79c6a52a299137a6013061e0cf0e688fce5d7f1bc60125f520912fdb29ec25"
 dependencies = [
  "futures-core",
  "futures-sink",
@@ -356,15 +356,15 @@ dependencies = [
 
 [[package]]
 name = "futures-core"
-version = "0.3.12"
+version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "79e5145dde8da7d1b3892dad07a9c98fc04bc39892b1ecc9692cf53e2b780a65"
+checksum = "098cd1c6dda6ca01650f1a37a794245eb73181d0d4d4e955e2f3c37db7af1815"
 
 [[package]]
 name = "futures-executor"
-version = "0.3.12"
+version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e9e59fdc009a4b3096bf94f740a0f2424c082521f20a9b08c5c07c48d90fd9b9"
+checksum = "10f6cb7042eda00f0049b1d2080aa4b93442997ee507eb3828e8bd7577f94c9d"
 dependencies = [
  "futures-core",
  "futures-task",
@@ -373,15 +373,15 @@ dependencies = [
 
 [[package]]
 name = "futures-io"
-version = "0.3.12"
+version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28be053525281ad8259d47e4de5de657b25e7bac113458555bb4b70bc6870500"
+checksum = "365a1a1fb30ea1c03a830fdb2158f5236833ac81fa0ad12fe35b29cddc35cb04"
 
 [[package]]
 name = "futures-macro"
-version = "0.3.12"
+version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c287d25add322d9f9abdcdc5927ca398917996600182178774032e9f8258fedd"
+checksum = "668c6733a182cd7deb4f1de7ba3bf2120823835b3bcfbeacf7d2c4a773c1bb8b"
 dependencies = [
  "proc-macro-hack",
  "proc-macro2",
@@ -391,24 +391,21 @@ dependencies = [
 
 [[package]]
 name = "futures-sink"
-version = "0.3.12"
+version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "caf5c69029bda2e743fddd0582d1083951d65cc9539aebf8812f36c3491342d6"
+checksum = "5c5629433c555de3d82861a7a4e3794a4c40040390907cfbfd7143a92a426c23"
 
 [[package]]
 name = "futures-task"
-version = "0.3.12"
+version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13de07eb8ea81ae445aca7b69f5f7bf15d7bf4912d8ca37d6645c77ae8a58d86"
-dependencies = [
- "once_cell",
-]
+checksum = "ba7aa51095076f3ba6d9a1f702f74bd05ec65f555d70d2033d55ba8d69f581bc"
 
 [[package]]
 name = "futures-util"
-version = "0.3.12"
+version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "632a8cd0f2a4b3fdea1657f08bde063848c3bd00f9bbf6e256b8be78802e624b"
+checksum = "3c144ad54d60f23927f0a6b6d816e4271278b64f005ad65e4e35291d2de9c025"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -468,9 +465,9 @@ dependencies = [
 
 [[package]]
 name = "h2"
-version = "0.3.0"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b67e66362108efccd8ac053abafc8b7a8d86a37e6e48fc4f6f7485eb5e9e6a5"
+checksum = "fc018e188373e2777d0ef2467ebff62a08e66c3f5857b23c8fbec3018210dc00"
 dependencies = [
  "bytes",
  "fnv",
@@ -483,7 +480,6 @@ dependencies = [
  "tokio",
  "tokio-util",
  "tracing",
- "tracing-futures",
 ]
 
 [[package]]
@@ -526,9 +522,9 @@ dependencies = [
 
 [[package]]
 name = "http"
-version = "0.2.3"
+version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7245cd7449cc792608c3c8a9eaf69bd4eabbabf802713748fd739c98b82f0747"
+checksum = "527e8c9ac747e28542699a951517aa9a6945af506cd1f2e1b53a576c17b6cc11"
 dependencies = [
  "bytes",
  "fnv",
@@ -537,19 +533,20 @@ dependencies = [
 
 [[package]]
 name = "http-body"
-version = "0.4.0"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2861bd27ee074e5ee891e8b539837a9430012e249d7f0ca2d795650f579c1994"
+checksum = "5dfb77c123b4e2f72a2069aeae0b4b4949cc7e966df277813fc16347e7549737"
 dependencies = [
  "bytes",
  "http",
+ "pin-project-lite",
 ]
 
 [[package]]
 name = "httparse"
-version = "1.3.5"
+version = "1.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "615caabe2c3160b313d52ccc905335f4ed5f10881dd63dc5699d47e90be85691"
+checksum = "bc35c995b9d93ec174cf9a27d425c7892722101e14993cd227fdb51d70cf9589"
 
 [[package]]
 name = "httpdate"
@@ -559,9 +556,9 @@ checksum = "494b4d60369511e7dea41cf646832512a94e542f68bb9c49e54518e0f468eb47"
 
 [[package]]
 name = "hyper"
-version = "0.14.4"
+version = "0.14.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e8e946c2b1349055e0b72ae281b238baf1a3ea7307c7e9f9d64673bdd9c26ac7"
+checksum = "8bf09f61b52cfcf4c00de50df88ae423d6c02354e385a86341133b5338630ad1"
 dependencies = [
  "bytes",
  "futures-channel",
@@ -573,7 +570,7 @@ dependencies = [
  "httparse",
  "httpdate",
  "itoa",
- "pin-project 1.0.5",
+ "pin-project",
  "socket2",
  "tokio",
  "tower-service",
@@ -598,9 +595,9 @@ dependencies = [
 
 [[package]]
 name = "idna"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de910d521f7cc3135c4de8db1cb910e0b5ed1dc6f57c381cd07e8e661ce10094"
+checksum = "89829a5d69c23d348314a7ac337fe39173b61149a9864deabd260983aed48c21"
 dependencies = [
  "matches",
  "unicode-bidi",
@@ -627,9 +624,9 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "1.6.1"
+version = "1.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fb1fa934250de4de8aef298d81c729a7d33d8c239daa3a7575e6b92bfc7313b"
+checksum = "824845a0bf897a9042383849b02c1bc219c2383772efcd5c6f9766fa4b81aef3"
 dependencies = [
  "autocfg",
  "hashbrown",
@@ -658,9 +655,9 @@ checksum = "dd25036021b0de88a0aff6b850051563c6516d0bf53f8638938edbb9de732736"
 
 [[package]]
 name = "js-sys"
-version = "0.3.47"
+version = "0.3.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5cfb73131c35423a367daf8cbd24100af0d077668c8c2943f0e7dd775fef0f65"
+checksum = "2d99f9e3e84b8f67f846ef5b4cbbc3b1c29f6c759fcbce6f01aa0e73d932a24c"
 dependencies = [
  "wasm-bindgen",
 ]
@@ -673,15 +670,15 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.86"
+version = "0.2.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"
+checksum = "9385f66bf6105b241aa65a61cb923ef20efc665cb9f9bb50ac2f0c4b7f378d41"
 
 [[package]]
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-version = "0.4.2"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd96ffd135b2fd7b973ac026d28085defbe8983df057ced3eb4f2130b0831312"
+checksum = "5a3c91c24eae6777794bb1997ad98bbb87daf92890acab859f7eaa4320333176"
 dependencies = [
  "scopeguard",
 ]
@@ -738,9 +735,9 @@ checksum = "2a60c7ce501c71e03a9c9c0d35b861413ae925bd979cc7a4e30d060069aaac8d"
 
 [[package]]
 name = "miniz_oxide"
-version = "0.4.3"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f2d26ec3309788e423cfbf68ad1800f061638098d76a83681af979dc4eda19d"
+checksum = "a92518e98c078586bc6c934028adcca4c92a53d6a958196de835170a01d84e4b"
 dependencies = [
  "adler",
  "autocfg",
@@ -748,9 +745,9 @@ dependencies = [
 
 [[package]]
 name = "mio"
-version = "0.7.7"
+version = "0.7.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e50ae3f04d169fcc9bde0b547d1c205219b7157e07ded9c5aff03e0637cb3ed7"
+checksum = "cf80d3e903b34e0bd7282b218398aec54e082c840d9baf8339e0080a0c542956"
 dependencies = [
  "libc",
  "log",
@@ -761,11 +758,10 @@ dependencies = [
 
 [[package]]
 name = "miow"
-version = "0.3.6"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a33c1b55807fbed163481b5ba66db4b2fa6cde694a5027be10fb724206c5897"
+checksum = "b9f1c5b025cda876f66ef43a113f91ebc9f4ccef34843000e0adf6ebbab84e21"
 dependencies = [
- "socket2",
  "winapi",
 ]
 
@@ -802,9 +798,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.5.2"
+version = "1.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13bd41f508810a131401606d54ac32a467c97172d74ba7662562ebba5ad07fa0"
+checksum = "af8b08b04175473088b46763e51ee54da5f9a164bc162f615b91bc179dbf15a3"
 
 [[package]]
 name = "parking_lot"
@@ -893,38 +889,18 @@ dependencies = [
 
 [[package]]
 name = "pin-project"
-version = "0.4.27"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2ffbc8e94b38ea3d2d8ba92aea2983b503cd75d0888d75b86bb37970b5698e15"
+checksum = "bc174859768806e91ae575187ada95c91a29e96a98dc5d2cd9a1fed039501ba6"
 dependencies = [
- "pin-project-internal 0.4.27",
-]
-
-[[package]]
-name = "pin-project"
-version = "1.0.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96fa8ebb90271c4477f144354485b8068bd8f6b78b428b01ba892ca26caf0b63"
-dependencies = [
- "pin-project-internal 1.0.5",
+ "pin-project-internal",
 ]
 
 [[package]]
 name = "pin-project-internal"
-version = "0.4.27"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "65ad2ae56b6abe3a1ee25f15ee605bacadb9a764edaba9c2bf4103800d4a1895"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
-[[package]]
-name = "pin-project-internal"
-version = "1.0.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "758669ae3558c6f74bd2a18b41f7ac0b5a195aea6639d6a9b5e5d1ad5ba24c0b"
+checksum = "a490329918e856ed1b083f244e3bfe2d8c4f336407e4ea9e1a9f479ff09049e5"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -933,9 +909,9 @@ dependencies = [
 
 [[package]]
 name = "pin-project-lite"
-version = "0.2.4"
+version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "439697af366c49a6d0a010c56a0d97685bc140ce0d377b13a2ea2aa42d64a827"
+checksum = "dc0e1f259c92177c30a4c9d177246edd0a3568b25756a977d0632cf8fa37e905"
 
 [[package]]
 name = "pin-utils"
@@ -993,23 +969,20 @@ checksum = "bc881b2c22681370c6a780e47af9840ef841837bc98118431d4e1868bd0c1086"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.24"
+version = "1.0.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e0704ee1a7e00d7bb417d0770ea303c1bccbabf0ef1667dae92b5967f5f8a71"
+checksum = "a152013215dca273577e18d2bf00fa862b89b24169fb78c4c95aeb07992c9cec"
 dependencies = [
  "unicode-xid",
 ]
 
 [[package]]
 name = "publicsuffix"
-version = "1.5.4"
+version = "1.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3bbaa49075179162b49acac1c6aa45fb4dafb5f13cf6794276d77bc7fd95757b"
+checksum = "95b4ce31ff0a27d93c8de1849cf58162283752f065a90d508f1105fa6c9a213f"
 dependencies = [
- "error-chain",
  "idna",
- "lazy_static",
- "regex",
  "url",
 ]
 
@@ -1084,27 +1057,26 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.4.3"
+version = "1.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9251239e129e16308e70d853559389de218ac275b515068abc96829d05b948a"
+checksum = "957056ecddbeba1b26965114e191d2e8589ce74db242b6ea25fc4062427a5c19"
 dependencies = [
  "aho-corasick",
  "memchr",
  "regex-syntax",
- "thread_local",
 ]
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.22"
+version = "0.6.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5eb417147ba9860a96cfe72a0b93bf88fee1744b5636ec99ab20c1aa9376581"
+checksum = "24d5f089152e60f62d28b835fbff2cd2e8dc0baf1ac13343bef92ab7eed84548"
 
 [[package]]
 name = "reqwest"
-version = "0.11.0"
+version = "0.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd281b1030aa675fb90aa994d07187645bb3c8fc756ca766e7c3070b439de9de"
+checksum = "bf12057f289428dbf5c591c74bf10392e4a8003f993405a902f20117019022d4"
 dependencies = [
  "async-compression",
  "base64",
@@ -1278,18 +1250,18 @@ checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
 [[package]]
 name = "serde"
-version = "1.0.123"
+version = "1.0.125"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92d5161132722baa40d802cc70b15262b98258453e85e5d1d365c757c73869ae"
+checksum = "558dc50e1a5a5fa7112ca2ce4effcb321b0300c0d4ccf0776a9f60cd89031171"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.123"
+version = "1.0.125"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9391c295d64fc0abb2c556bad848f33cb8296276b1ad2677d1ae1ace4f258f31"
+checksum = "b093b7a2bb58203b5da3056c05b4ec1fed827dcfdb37347a8841695263b3d06d"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1298,9 +1270,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.62"
+version = "1.0.64"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea1c6153794552ea7cf7cf63b1231a25de00ec90db326ba6264440fa08e31486"
+checksum = "799e97dc9fdae36a5c8b8f2cae9ce2ee9fdce2058c57a93e6099d919fd982f79"
 dependencies = [
  "itoa",
  "ryu",
@@ -1335,20 +1307,11 @@ version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2579985fda508104f7587689507983eadd6a6e84dd35d6d115361f530916fa0d"
 
-[[package]]
-name = "signal-hook-registry"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "16f1d0fef1604ba8f7a073c7e701f213e056707210e9020af4528e0101ce11a6"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "siphasher"
-version = "0.3.3"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa8f3741c7372e75519bd9346068370c9cdaabcc1f9599cbcf2a2719352286b7"
+checksum = "cbce6d4507c7e4a3962091436e56e95290cb71fa302d0d270e32130b75fbff27"
 
 [[package]]
 name = "slab"
@@ -1364,11 +1327,10 @@ checksum = "fe0f37c9e8f3c5a4a66ad655a93c74daac4ad00c441533bf5c6e7990bb42604e"
 
 [[package]]
 name = "socket2"
-version = "0.3.19"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "122e570113d28d773067fab24266b66753f6ea915758651696b6e35e49f88d6e"
+checksum = "9e3dfc207c526015c632472a77be09cf1b6e46866581aecae5cc38fb4235dea2"
 dependencies = [
- "cfg-if",
  "libc",
  "winapi",
 ]
@@ -1387,9 +1349,9 @@ checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
 
 [[package]]
 name = "standback"
-version = "0.2.15"
+version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2beb4d1860a61f571530b3f855a1b538d0200f7871c63331ecd6f17b1f014f8"
+checksum = "e113fb6f3de07a243d434a56ec6f186dfd51cb08448239fe7bcae73f87ff28ff"
 dependencies = [
  "version_check",
 ]
@@ -1500,9 +1462,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.60"
+version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c700597eca8a5a762beb35753ef6b94df201c81cca676604f547495a0d7f0081"
+checksum = "48fe99c6bd8b1cc636890bcc071842de909d902c81ac7dab53ba33c421ab8ffb"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1546,9 +1508,9 @@ dependencies = [
 
 [[package]]
 name = "time"
-version = "0.2.25"
+version = "0.2.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1195b046942c221454c2539395f85413b33383a067449d78aab2b7b052a142f7"
+checksum = "08a8cbfbf47955132d0202d1662f49b2423ae35862aee471f3ba4b133358f372"
 dependencies = [
  "const_fn",
  "libc",
@@ -1584,9 +1546,9 @@ dependencies = [
 
 [[package]]
 name = "tinyvec"
-version = "1.1.1"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "317cca572a0e89c3ce0ca1f1bdc9369547fe318a683418e42ac8f59d14701023"
+checksum = "5b5220f05bb7de7f3f53c7c065e1199b3172696fe2db9f9c4d8ad9b4ee74c342"
 dependencies = [
  "tinyvec_macros",
 ]
@@ -1599,9 +1561,9 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
 
 [[package]]
 name = "tokio"
-version = "1.2.0"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e8190d04c665ea9e6b6a0dc45523ade572c088d2e6566244c1122671dbf4ae3a"
+checksum = "134af885d758d645f0f0505c9a8b3f9bf8a348fd822e112ab5248138348f1722"
 dependencies = [
  "autocfg",
  "bytes",
@@ -1609,12 +1571,8 @@ dependencies = [
  "memchr",
  "mio",
  "num_cpus",
- "once_cell",
- "parking_lot",
  "pin-project-lite",
- "signal-hook-registry",
  "tokio-macros",
- "winapi",
 ]
 
 [[package]]
@@ -1641,9 +1599,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-util"
-version = "0.6.3"
+version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ebb7cb2f00c5ae8df755b252306272cd1790d39728363936e01827e11f0b017b"
+checksum = "5143d049e85af7fbc36f5454d990e62c2df705b3589f123b71f441b6b59f443f"
 dependencies = [
  "bytes",
  "futures-core",
@@ -1661,9 +1619,9 @@ checksum = "360dfd1d6d30e05fda32ace2c8c70e9c0a9da713275777f5a4dbb8a1893930c6"
 
 [[package]]
 name = "tracing"
-version = "0.1.23"
+version = "0.1.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7d40a22fd029e33300d8d89a5cc8ffce18bb7c587662f54629e94c9de5487f3"
+checksum = "01ebdc2bb4498ab1ab5f5b73c5803825e60199229ccba0698170e3be0e7f959f"
 dependencies = [
  "cfg-if",
  "pin-project-lite",
@@ -1679,16 +1637,6 @@ dependencies = [
  "lazy_static",
 ]
 
-[[package]]
-name = "tracing-futures"
-version = "0.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab7bb6f14721aa00656086e9335d363c5c8747bae02ebe32ea2c7dece5689b4c"
-dependencies = [
- "pin-project 0.4.27",
- "tracing",
-]
-
 [[package]]
 name = "try-lock"
 version = "0.2.3"
@@ -1697,9 +1645,9 @@ checksum = "59547bce71d9c38b83d9c0e92b6066c4253371f15005def0c30d9657f50c7642"
 
 [[package]]
 name = "unicode-bidi"
-version = "0.3.4"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"
+checksum = "eeb8be209bb1c96b7c177c7420d26e04eccacb0eeae6b980e35fcb74678107e0"
 dependencies = [
  "matches",
 ]
@@ -1739,9 +1687,9 @@ checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
 
 [[package]]
 name = "url"
-version = "2.2.0"
+version = "2.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5909f2b0817350449ed73e8bcd81c8c3c8d9a7a5d8acba4b27db277f1868976e"
+checksum = "9ccd964113622c8e9322cfac19eb1004a07e636c545f325da085d5cdde6f1f8b"
 dependencies = [
  "form_urlencoded",
  "idna",
@@ -1763,15 +1711,15 @@ checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 
 [[package]]
 name = "version_check"
-version = "0.9.2"
+version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
+checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
 
 [[package]]
 name = "walkdir"
-version = "2.3.1"
+version = "2.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "777182bc735b6424e1a57516d35ed72cb8019d85c8c9bf536dccb3445c1a2f7d"
+checksum = "808cf2735cd4b6866113f648b791c6adc5714537bc222d9347bb203386ffda56"
 dependencies = [
  "same-file",
  "winapi",
@@ -1796,9 +1744,9 @@ checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.70"
+version = "0.2.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "55c0f7123de74f0dab9b7d00fd614e7b19349cd1e2f5252bbe9b1754b59433be"
+checksum = "83240549659d187488f91f33c0f8547cbfef0b2088bc470c116d1d260ef623d9"
 dependencies = [
  "cfg-if",
  "serde",
@@ -1808,9 +1756,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.70"
+version = "0.2.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7bc45447f0d4573f3d65720f636bbcc3dd6ce920ed704670118650bcd47764c7"
+checksum = "ae70622411ca953215ca6d06d3ebeb1e915f0f6613e3b495122878d7ebec7dae"
 dependencies = [
  "bumpalo",
  "lazy_static",
@@ -1823,9 +1771,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.20"
+version = "0.4.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3de431a2910c86679c34283a33f66f4e4abd7e0aec27b6669060148872aadf94"
+checksum = "81b8b767af23de6ac18bf2168b690bed2902743ddf0fb39252e36f9e2bfc63ea"
 dependencies = [
  "cfg-if",
  "js-sys",
@@ -1835,9 +1783,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.70"
+version = "0.2.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b8853882eef39593ad4174dd26fc9865a64e84026d223f63bb2c42affcbba2c"
+checksum = "3e734d91443f177bfdb41969de821e15c516931c3c3db3d318fa1b68975d0f6f"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -1845,9 +1793,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.70"
+version = "0.2.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4133b5e7f2a531fa413b3a1695e925038a05a71cf67e87dafa295cb645a01385"
+checksum = "d53739ff08c8a68b0fdbcd54c372b8ab800b1449ab3c9d706503bc7dd1621b2c"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1858,15 +1806,15 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.70"
+version = "0.2.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd4945e4943ae02d15c13962b38a5b1e81eadd4b71214eee75af64a4d6a4fd64"
+checksum = "d9a543ae66aa233d14bb765ed9af4a33e81b8b58d1584cf1b47ff8cd0b9e4489"
 
 [[package]]
 name = "web-sys"
-version = "0.3.47"
+version = "0.3.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c40dc691fc48003eba817c38da7113c15698142da971298003cac3ef175680b3"
+checksum = "a905d57e488fec8861446d3393670fb50d27a262344013181c2cdf9fff5481be"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
@@ -1884,9 +1832,9 @@ dependencies = [
 
 [[package]]
 name = "webpki-roots"
-version = "0.21.0"
+version = "0.21.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "82015b7e0b8bad8185994674a13a93306bea76cf5a16c5a181382fd3a5ec2376"
+checksum = "aabe153544e473b775453675851ecc86863d2a81d786d741f6b76778f2a48940"
 dependencies = [
  "webpki",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index ca78c75..ce2ec71 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2018"
 
 [dependencies]
 reqwest = { version = "0.11.0", default-features = false, features = ["cookies", "gzip", "json", "rustls-tls", "stream"] }
-tokio = { version = "1.0.2", features = ["full"] }
+tokio = { version = "1.0.2", features = ["fs", "macros", "net", "rt-multi-thread"] }
 tokio-util = { version = "0.6.1", features = ["io"] }
 serde_json = "1.0.51"
 scraper = "0.12.0"