allows set postgis version for macos #232

Job	Run time
parametrized (ubuntu-latest)	50s
default (ubuntu-latest)	2m 52s
parametrized (windows-latest)	4m 20s
default (ubuntu-24.04)	52s
parametrized (macos-latest)	5m 23s
default (ubuntu-22.04)	56s
default (ubuntu-20.04)	39s
default (macos-latest)	3m 37s
default (macos-13)	7m 20s
default (macos-14)	4m 30s
default (windows-latest)	4m 16s
default (windows-2019)	3m 45s
default (windows-2022)	4m 16s
	43m 36s

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