Fixes and CMake v3.29.0-rc1

The get-cmake action downloads and caches CMake and Ninja on your workflows. Versions can be specified using semantic versioning ranges using cmakeVersion and ninjaVersion inputs.

Changes:

• Fix for #123
• latestrc is now CMake version v3.29.0-rc1, e.g.:

   uses: lukka/get-cmake@latest
   with:
      cmakeVersion: latestrc  

Enjoy!