1.35rc1

Improvements:

• Ready for Python 3.10. #828 #837

Bugfixes:

• Reverse the SSL authentication mode for API requests (for Python 3.10). #836
• Update Mapping type to match new mypy (by @sobolevn). #834
• Retry on asyncio.TimeoutError during API requests (by @philipp-sontag-by). #841

Refactoring:

• Replaced aiojobs with a self-made fire-and-forget task orchestrator (for Python 3.10). #835