Add support for Windows #70

Job	Run time
phpstan (7.4)	13s
phpstan (8.3)	18s
tests (ubuntu-latest, 8.1, lowest)	12s
tests (ubuntu-latest, 8.0, highest)	17s
tests (windows-latest, 7.4, highest)	1m 25s
tests (ubuntu-latest, 8.4, highest)	16s
tests (ubuntu-latest, 7.4, lowest)	13s
tests (ubuntu-latest, 8.1, highest)	18s
tests (ubuntu-latest, 8.2, lowest)	18s
tests (ubuntu-latest, 8.5, highest)	16s
tests (windows-latest, 7.4, lowest)	41s
tests (ubuntu-latest, 8.0, lowest)	21s
tests (ubuntu-latest, 8.4, lowest)	14s
tests (ubuntu-latest, 8.3, lowest)	18s
tests (windows-latest, 8.2, lowest)	42s
tests (ubuntu-latest, 8.3, highest)	16s
tests (ubuntu-latest, 7.4, highest)	17s
tests (windows-latest, 8.0, lowest)	42s
tests (windows-latest, 8.1, lowest)	42s
tests (windows-latest, 8.0, highest)	38s
tests (ubuntu-latest, 8.5, lowest)	20s
tests (windows-latest, 8.2, highest)	42s
tests (windows-latest, 8.3, lowest)	1m 11s
tests (windows-latest, 8.3, highest)	38s
tests (ubuntu-latest, 8.2, highest)	20s
tests (windows-latest, 8.4, highest)	39s
tests (windows-latest, 8.1, highest)	44s
tests (windows-latest, 8.5, lowest)	46s
tests (windows-latest, 8.5, highest)	44s
tests (windows-latest, 8.4, lowest)	36s
	15m 17s

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