1.1-rc

Update README for GINO 1.1

Update aiomysql

Fix CI for Python 3.6

Remove async_generator because we don't support Python 3.5

Update versions in CD

Add Python 3.10 CI target

Update versions in CI

Update development dependencies

minor typo

Merge pull request #786 from Reskov/optimize-do-load

Optimize model loader do load method

fix workflow

updated Python version in pyproject and otherwhere

Non-trivial changes for asyncpg.py file