generator-jhipster: Generator doesn't work with Node 10

I know we only support Node.js LTS, but we might want to look into supporting Node 10. Currently, the following error happens when you try to use Node 10.

WARNING! Something went wrong fetching the latest JHipster version number...
(node:15239) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability
issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.