Tests

[WIP] Rewrite based on `NamedDimsArrays.jl`/`ITensorBase.jl` #21

Job	Run time
Tests (1, macOS-latest) / Julia 1 - macOS-latest	3m 9s
Tests (1, ubuntu-latest) / Julia 1 - ubuntu-latest	3m 28s
Tests (1, windows-latest) / Julia 1 - windows-latest	4m 16s
Tests (lts, ubuntu-latest) / Julia lts - ubuntu-latest	3m 11s
Tests (lts, windows-latest) / Julia lts - windows-latest	3m 45s
Tests (lts, macOS-latest) / Julia lts - macOS-latest	57s
	18m 46s

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