General, language:

• Fix typed_ast support for Python 3.11 (fixed in 1.5.4)
• Get tests running (Run Python 3.11 tests in CI #12833)
• Unbreak mypyc (Python 3.11 support mypyc/mypyc#931)
• Fixes for asyncio.coroutine removal (Use async def in pythoneval tests #12834, Remove failing test on Python 3.11 #12917)
• Fix mypyc traceback tests
• Make tests on Python 3.11 required
• Run lxml tests on Python 3.11
• PEP 654 (exception groups)
• Support for new enum features (New enum features in Python 3.11 #12841)
• Add tests for the following language changes: Syntax error with async generator inside dictionary comprehension cpython#77527 , Unpacking without parentheses is allowed since 3.9 cpython#90881
• Building wheels
• Adding classifier

New typing features:

• PEP 655 (Required, NotRequired)
• PEP 646 (variadic generics, Support for PEP 646 #12280)
• PEP 673 (Self type, support pep 673 Self type #11871)
• PEP 675 (LiteralString, Support PEP 675 (LiteralString) #12554, Recognise LiteralString as str #12559)
• PEP 681 (dataclass_transform, Support PEP 681 (dataclass_transform) #14293)