Fix for deleting objects: object path must be URL percent-encoded.

Requests to delete individual versions were failing but the errors do not bubble up.

lib/waffle/storage/google/cloud_storage.ex

@@ -50,7 +50,7 @@ defmodule Waffle.Storage.Google.CloudStorage do
     Objects.storage_objects_delete(
       conn(),
       bucket(definition),
-      path_for(definition, version, meta)
+      path_for(definition, version, meta) |> URI.encode_www_form()
     )
   end