Make tests (excluding RegressionTests.jl) run 37% faster (#141) #423

Job	Run time
Documentation	3m 33s
Typos	4s
Julia min - ubuntu-latest - x64 - push	3m 39s
Julia min - macOS-latest - x64 - push	5m 9s
Julia min - windows-latest - x64 - push	7m 45s
Julia lts - ubuntu-latest - x64 - push	21m 2s
Julia lts - macOS-latest - x64 - push	17m 22s
Julia lts - windows-latest - x64 - push	3m 52s
Julia 1 - ubuntu-latest - x64 - push	19m 50s
Julia 1 - macOS-latest - x64 - push	15m 55s
Julia 1 - windows-latest - x64 - push	4m 26s
Julia pre - ubuntu-latest - x64 - push	17m 9s
Julia pre - macOS-latest - x64 - push	21m 14s
Julia pre - windows-latest - x64 - push	4m 16s
Julia nightly - ubuntu-latest - x64 - push	14m 23s
Julia nightly - macOS-latest - x64 - push	20m 9s
Julia nightly - windows-latest - x64 - push	4m 36s
	3h 4m 24s

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