CMake

Merge pull request #58 from dlparkhurst/viscosity #237

# to view logs

Run time

Learn about OS # on GitHub Actions

Job	Run time
🚧⚫ mingw32	17s
build (macos-latest)	1m 34s
build (ubuntu-latest)	2m 29s
build (windows-latest)	3m 32s
ctest (macos-latest)	1m 15s
ctest (ubuntu-latest)	2m 5s
ctest (windows-latest)	3m 33s
	14m 45s