I suggest we officially end of life typed-ast:

• Officially stop support after Python 3.10 (i.e. close Compilation fails on Python 3.11 #167).
• Add recommendation to use ast on Python 3.8+ in the package's long_description and more prominently in the README.
• Add < 3.11 to python_requires.

We can keep maintaining it until 3.7 (or 3.10) reaches end of life, and improved ast is generally available.