MatrixAlgebraKit decompositions #754

Job	Run time
Julia 1 - macOS-latest -	11m 9s
Julia lts - ubuntu-latest -	10m 49s
Julia lts - macOS-latest -	7m 12s
Julia 1 - ubuntu-latest -	13m 31s
Julia lts - windows-latest -	12m 11s
Julia 1 - windows-latest -	14m 27s
Julia nightly - ${{ matrix.os }} - ${{ matrix.arch }}	0s
	1h 9m 19s

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