Add support for Windows #74

Job	Run time
phpstan (8.3)	13s
phpstan (7.4)	15s
tests (ubuntu-latest, 7.4, lowest)	15s
tests (ubuntu-latest, 8.1, lowest)	11s
tests (ubuntu-latest, 8.0, highest)	11s
tests (ubuntu-latest, 8.3, lowest)	12s
tests (ubuntu-latest, 8.0, lowest)	11s
tests (ubuntu-latest, 8.2, highest)	11s
tests (windows-latest, 8.1, lowest)	37s
tests (windows-latest, 8.2, highest)	41s
tests (windows-latest, 7.4, lowest)	35s
tests (ubuntu-latest, 8.5, highest)	16s
tests (windows-latest, 8.0, lowest)	41s
tests (ubuntu-latest, 8.4, lowest)	16s
tests (ubuntu-latest, 7.4, highest)	12s
tests (windows-latest, 8.5, highest)	38s
tests (windows-latest, 8.4, lowest)	47s
tests (windows-latest, 8.2, lowest)	1m 5s
tests (windows-latest, 8.5, lowest)	33s
tests (windows-latest, 8.4, highest)	39s
tests (windows-latest, 7.4, highest)	41s
tests (windows-latest, 8.3, lowest)	41s
tests (ubuntu-latest, 8.1, highest)	17s
tests (windows-latest, 8.3, highest)	37s
tests (windows-latest, 8.1, highest)	43s
tests (ubuntu-latest, 8.2, lowest)	17s
tests (ubuntu-latest, 8.4, highest)	13s
tests (ubuntu-latest, 8.3, highest)	15s
tests (ubuntu-latest, 8.5, lowest)	15s
tests (windows-latest, 8.0, highest)	41s
	13m 19s

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