Better GitHub Action workflow for JuliaFormatter #453

Job	Run time
Test Julia ~1.10.0-0 ubuntu-latest	2m 22s
Test Julia 1.9 ubuntu-latest	1m 51s
Test Julia 1.8 ubuntu-latest	1m 15s
Test Julia 1.7 ubuntu-latest	1m 32s
Test Julia 1.6 ubuntu-latest	1m 36s
Test Julia 1.5 ubuntu-latest	1m 11s
Test Julia 1.4 ubuntu-latest	2m 38s
Test Julia nightly ubuntu-latest	7m 7s
Test Julia 1 windows-latest	2m 56s
Test Julia 1.4 windows-latest	10m 18s
Test Julia nightly windows-latest	9m 56s
Test Julia 1 macOS-latest	2m 49s
Test Julia 1.4 macOS-latest	4m 15s
Test Julia nightly macOS-latest	6m 35s
	56m 21s

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