mypy: Add type hints #125

Job	Run time
Validate coverage	41s
Build the documentation	34s
Lint and type check the package	31s
Python: 3.9-x64 on ubuntu-22.04	28s
Python: 3.9-x64 on windows-latest	1m 23s
Python: 3.9-x86 on windows-latest	1m 35s
Python: 3.9-arm64 on macos-14	48s
Python: 3.9-x64 on macos-13	37s
Python: 3.10-x64 on ubuntu-22.04	33s
Python: 3.10-x64 on windows-latest	1m 32s
Python: 3.10-x86 on windows-latest	1m 32s
Python: 3.10-arm64 on macos-14	51s
Python: 3.10-x64 on macos-13	35s
Python: 3.11-x64 on ubuntu-22.04	26s
Python: 3.11-x64 on windows-latest	1m 26s
Python: 3.11-x86 on windows-latest	1m 41s
Python: 3.11-x64 on macos-14	42s
Python: 3.11-arm64 on macos-14	33s
Python: 3.11-x64 on macos-13	45s
Python: 3.12-x64 on ubuntu-22.04	34s
Python: 3.12-x64 on windows-latest	1m 19s
Python: 3.12-x86 on windows-latest	1m 30s
Python: 3.12-x64 on macos-14	47s
Python: 3.12-arm64 on macos-14	31s
Python: 3.12-x64 on macos-13	42s
Python: 3.13-x64 on ubuntu-22.04	40s
Python: 3.13-x64 on windows-latest	1m 26s
Python: 3.13-x86 on windows-latest	1m 44s
Python: 3.13-x64 on macos-14	49s
Python: 3.13-arm64 on macos-14	24s
Python: 3.13-x64 on macos-13	45s
Python: pypy-3.9-x64 on ubuntu-22.04	44s
Python: pypy-3.10-x64 on ubuntu-22.04	49s
Python: pypy-3.10-x64 on windows-latest	2m 24s
Python: pypy-3.10-x86 on windows-latest	1m 54s
Python: pypy-3.10-x64 on macos-14	1m 23s
Python: pypy-3.10-arm64 on macos-14	1m 2s
Python: pypy-3.10-x64 on macos-13	55s
	37m 35s

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