Tests

Refactor algorithm selection logic #129

Job	Run time
Tests (1, macOS-latest) / Julia 1 - macOS-latest	11m 47s
Tests (lts, macOS-latest) / Julia lts - macOS-latest	9m 37s
Tests (1, ubuntu-latest) / Julia 1 - ubuntu-latest	18m 21s
Tests (lts, windows-latest) / Julia lts - windows-latest	16m 46s
Tests (1, windows-latest) / Julia 1 - windows-latest	18m 15s
Tests (lts, ubuntu-latest) / Julia lts - ubuntu-latest	14m 42s
	1h 29m 28s

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