Fix GitHubApiTests

* createMilestoneWhenValidParametersThenSuccess()

Issue gh-36

Author: sjohnr

api/github/src/test/resources/CreateMilestoneRequest.json

@@ -1 +1 @@
-{"due_on":"2022-05-04T12:00:00Z","title":"1.0.0"}
+{"title":"1.0.0","due_on":"2022-05-04T12:00:00Z"}