* cleanup: support CMake >= 3.10
This aligns the project with the CMake support policies in:
https://opensource.google/documentation/policies/cplusplus-support
I also simplied the management of CMake policies. Most of the overriden
policies (anything <= CMP0067) are enabled by default when you require
CMake >= 3.10. But it is easier to just declare that you will accept
newer policies when they are available using the `...3.22` notation.
* Address review comments
* inlined links
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Co-authored-by: dominic <510002+dmah42@users.noreply.github.com>
