fix hound again

Author: Roy-Mao

spec/fcm_spec.rb

@@ -634,7 +634,7 @@
       ).and_return(google_authorizer_double)
       allow(google_authorizer_double).to receive(
         :fetch_access_token!
-      ).and_return({ 'access_token' => access_token })
+      ).and_return('access_token' => access_token)
 
       fcm = described_class.new(api_key, json_key_path, project_name)
       fcm.send_v1(send_v1_params).should eq(