enable percent-encode feature on cookies

Closes #133

Author: yoshuawuyts

Cargo.toml

@@ -31,7 +31,7 @@ async-std = { version = "1.4.0", features = ["unstable"] }
 http = { version = "0.2.0", optional = true }
 
 anyhow = "1.0.26"
-cookie = "0.12.0"
+cookie = { version = "0.12.0", features = ["percent-encode"] }
 infer = "0.1.2"
 omnom = "2.1.1"
 pin-project-lite = "0.1.0"