remove LinearAlgebra dep #286

Job	Run time
Julia 1.0 - ubuntu-latest - x64	1m 47s
Julia 1.0 - macOS-latest - x64	2m 20s
Julia 1.0 - windows-latest - x64	4m 7s
Julia 1.3 - ubuntu-latest - x64	1m 51s
Julia 1.3 - macOS-latest - x64	2m 47s
Julia 1.3 - windows-latest - x64	11m 56s
Julia 1.5 - ubuntu-latest - x64	1m 8s
Julia 1.5 - macOS-latest - x64	2m 6s
Julia 1.5 - windows-latest - x64	9m 47s
Julia 1.6 - ubuntu-latest - x64	1m 1s
Julia 1.6 - macOS-latest - x64	1m 43s
Julia 1.6 - windows-latest - x64	6m 17s
Julia 1.7 - ubuntu-latest - x64	1m 3s
Julia 1.7 - macOS-latest - x64	1m 12s
Julia 1.7 - windows-latest - x64	1m 16s
Julia 1 - ubuntu-latest - x64	1m 2s
Julia 1 - macOS-latest - x64	1m 10s
Julia 1 - windows-latest - x64	1m 23s
Julia nightly - ubuntu-latest - x64	1m 22s
Julia nightly - macOS-latest - x64	2m 39s
Julia nightly - windows-latest - x64	1m 41s
	59m 38s

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