Drop of Node.js 12 support and deprecation of Node.js 14 support

Nevertheless, our recommendation is to always use SonarSource/sonarcloud-github-action@master , as it is documented in our tutorials and main docs. This will ensure you are up to date!

Unfortunately this advice didn’t age well. The recent breakage proves that 's better to follow GitHub recommendations and not use @master. Instead use dependabot for checking if there is a new, working (!) version of the action available.