Modernize stubs #612

Job	Run time
Build docs & run doctests	34s
Verify dev env (ubuntu-latest)	21s
Verify dev env (windows-latest)	53s
Tests & Mypy on 3.7	1m 9s
Tests & Mypy on 3.8	48s
Tests & Mypy on 3.9	46s
Tests & Mypy on 3.10	1m 45s
Tests & Mypy on 3.11	1m 59s
Tests & Mypy on 3.12	2m 22s
Tests & Mypy on pypy-3.8	1m 13s
Tests & Mypy on pypy-3.9	1m 9s
Tests & Mypy on pypy-3.10	1m 16s
Check types using pyright	34s
Combine & check coverage.	0s
required-checks-pass	2s
	14m 51s

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