gulp build fails with latest node version

[weggetor]

Got always errors when trying to run "gulp anything". Tried to install / uninstall yarn, gulp etc.
At the end it was the node version! After installing v8.12.2 (LTS) everything works fine. Maybe add a note to the Wiki ?

[bdukes]

The long-term solution here is to upgrade to Gulp v4, but a note should probably also be added, for now. FYI, Yarn 1.7.0 is the first version to support Node.js 10, also.

[david-poindexter]

Thank you for reporting this @weggetor. And thanks for the assist here @bdukes (would you mind creating an issue for the Gulp v4 upgrade so we can get this on the roadmap)? For now, we have updated Wiki - Installation to notate our recommendation to use the latest LTS version.