0.23.0

Features:

• Backwards-incompatible: Make API title and version mandatory parameters.
  Before this change, the version would default to "1" and the title would
  be app.name. Those two parameters can be passed at init or as application
  configuration parameters TITLE and API_VERSION. Also rename
  OpenAPIVersionNotSpecified as MissingAPIParameterError. (:pr:169).
  Thanks :user:playpauseandstop for the help on this.

• Backwards-incompatible: Rework pagination documentation to allow more
  customization. This change will break code overriding
  PAGINATION_HEADER_DOC, _make_pagination_header or
  _prepare_pagination_doc (:pr:153).