Add support for PG 17 #210

Job	Run time
Run shellcheck	8s
Test setup-postgresql (macos-latest, 14)	13s
Test setup-postgresql (macos-latest, 12)	12s
Test setup-postgresql (macos-latest, 15)	12s
Test setup-postgresql (macos-latest, 16)	13s
Test setup-postgresql (macos-latest, 17)	13s
Test setup-postgresql (ubuntu-latest, 12)	19s
Test setup-postgresql (ubuntu-latest, 14)	15s
Test setup-postgresql (ubuntu-latest, 15)	23s
Test setup-postgresql (ubuntu-latest, 16)	17s
Test setup-postgresql (ubuntu-latest, 17)	34s
Test setup-postgresql (windows-latest, 12)	7m 44s
Test setup-postgresql (windows-latest, 14)	4m 20s
Test setup-postgresql (windows-latest, 15)	4m 26s
Test setup-postgresql (windows-latest, 16)	7m 32s
Test setup-postgresql (windows-latest, 17)	6m 43s
	33m 44s

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