Fix guild ghost members ._.

src/lib.rs

@@ -37,10 +37,10 @@ pub struct Guild {
 #[derive(Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct Member {
-	pub name: String,
-	pub rank: Rank,
+	pub name: Option<String>,
+	pub rank: Option<Rank>,
 	pub contributed: u64,
-	pub joined: String,
+	pub joined: Option<String>,
 	pub joined_friendly: String,
 }