3.2.0

• Make GH API URLs configurable (#41)
  • Add a github.api_base config value to set the API base URL.
  • GitHub: https://github.ibm.com/cloudant/service_engineering/issues/426
• Other improvements:
  • Upgrade requests to 2.22.0. Previously was set to 2.3.0, but 2.22.0 is
    the latest version. The version we end up with does not recognize json
    as a keyword argument to requests.put/post.
  • Change test runner to pytest