Actions: Enable all Python versions for macOS and Linux too
Actions: Enable all Python versions for macOS and Linux too

* Disable 3.8 on macOS until the duplicate symbol problem is
  solved.

* Disable 3.5 on macOS because Anaconda cannot install it
  anymore.

kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka