mypy

gh-145177: Support multiple Emscripten versions for Emscripten buildb… #10250

Job	Run time
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Tools/cases_generator	22s
Run mypy on Lib/tomllib	18s
Run mypy on Lib/_pyrepl	18s
Run mypy on Tools/peg_generator	23s
Run mypy on Tools/build	26s
Run mypy on Tools/clinic	18s
Run mypy on Tools/jit	17s
Run mypy on Lib/test/libregrtest	24s
	3m 3s

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