Bump actions/cache from 1 to 4 (#32) #92

Job	Run time
Julia 1.10 - ubuntu-latest - x64 - push	2m 33s
Julia 1.10 - macOS-latest - x64 - push	4m 58s
Julia 1.10 - windows-latest - x64 - push	4m 48s
Julia 1 - ubuntu-latest - x64 - push	3m 55s
Julia 1 - macOS-latest - x64 - push	5m 17s
Julia 1 - windows-latest - x64 - push	7m 57s
Julia nightly - ubuntu-latest - x64 - push	4m 11s
Julia nightly - macOS-latest - x64 - push	5m 39s
Julia nightly - windows-latest - x64 - push	7m 45s
	47m 3s

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