Release v0.3.1

Fixed

• Fixed readthedocs.org documentation build now requiring a .readthedocs.yaml config file
• Fixed a bug where the actual error message from an exception happening during execution through a Lab instance would
  be omitted
• Fixed an issue where exceptions in recipes could cause asyncio to print warning information about the _schedule
  coroutine never being awaited
• Fixed an issue where asyncio would warn about exceptions not having been retrieved from futures when more than one
  exception was raised during parallel execution. Alkymi will now just raise the first exception it encounters.