fix: Windows build warnings #5909

Job	Run time
ubuntu-latest.amd64.py3.8.sdist-bundle	48s
manylinux.amd64.py3.6.build	4m 9s
manylinux.amd64.py3.7.build	4m 13s
manylinux.amd64.py3.8.build	4m 7s
manylinux.aarch64.py${{ matrix.config.version }}.build	0s
manylinux.amd64.py3.9.build	4m 12s
macos.amd64.py3.6.build	9m 20s
manylinux.amd64.py3.10.build	4m 3s
macos.amd64.py3.7.build	12m 45s
windows-2019.amd64.py3.6.build	13m 40s
macos.amd64.py3.8.build	10m 47s
windows-2019.amd64.py3.7.build	15m 26s
macos.amd64.py3.9.build	18m 11s
windows-2019.amd64.py3.8.build	16m 0s
macos.amd64.py3.10.build	9m 19s
windows-2019.amd64.py3.9.build	17m 28s
windows-2019.amd64.py3.10.build	17m 6s
manylinux.aarch64.py${{ matrix.config.version }}.test	0s
ubuntu-latest.amd64.py3.8.sdist-build-test	4m 52s
manylinux.amd64.py3.6.test	3m 28s
manylinux.amd64.py3.7.test	3m 5s
manylinux.amd64.py3.8.test	2m 34s
manylinux.amd64.py3.9.test	2m 53s
manylinux.amd64.py3.10.test	2m 33s
windows-2019.amd64.py3.6.test	9m 2s
windows-2019.amd64.py3.7.test	8m 6s
windows-2019.amd64.py3.8.test	7m 32s
windows-2019.amd64.py3.9.test	7m 32s
windows-2019.amd64.py3.10.test	7m 3s
macos.amd64.py3.6.test	5m 54s
macos.amd64.py3.7.test	5m 26s
macos.amd64.py3.8.test	13m 30s
macos.amd64.py3.9.test	12m 45s
macos.amd64.py3.10.test	15m 46s
	4h 33m 35s

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