Hello SonarCloud 
community,
The scanner environment is going to require at least Node.js version 10 starting from the 16th of November for all JavaScript / TypeScript projects. Node.js versions below 10 are no longer officially supported. One benefit of this is that we will be able to deliver significant improvements to the analysis of your projects.
If you are affected by this change you are going to receive an email notification and a warning in the SonarCloud user interface as well as in the pull request decoration.
You can find more information and guidance on how to upgrade on our documentation. All users of the Automatic Analysis feature are already set and don’t need to take an action.
The SonarCloud Team