Merge pull request #63 from JuliaGeodynamics/mt_ISCimport #43

Job	Run time
Julia 1.9 - ubuntu-latest - x64 - push	5m 25s
Julia 1.9 - macOS-latest - x64 - push	12m 32s
Julia 1.9 - windows-latest - x64 - push	8m 16s
Julia 1.10 - ubuntu-latest - x64 - push	6m 15s
Julia 1.10 - macOS-latest - x64 - push	9m 9s
Julia 1.10 - windows-latest - x64 - push	9m 40s
Julia nightly - ubuntu-latest - x64 - push	12m 6s
Julia nightly - macOS-latest - x64 - push	12m 58s
Julia nightly - windows-latest - x64 - push	13m 31s
	1h 29m 52s

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