chore(cargo): Update url crate to 0.4

A recent update in url triggered a version split in my application and
broke my build.

Since hyper is still compatible with 0.2, I think it might make sense to
still allow that version.

Author: untitaker

Cargo.toml

@@ -22,7 +22,7 @@ time = "0.1"
 traitobject = "0.0.1"
 typeable = "0.1"
 unicase = "1.0"
-url = "0.2"
+url = ">= 0.2, <= 0.4"
 
 [dependencies.cookie]
 version = "0.1"