Upgrade node version requirement

[julien-appno]

"node": ">=8.9.1 <9.0.0",

9.0.0 maybe have to upgrade this to newer version?

[rajivnarayana]

Is this "node" engine requirement for your development? Why does this need to be enforced for users of your plugin ?

May be this could be something you remove (automatically) while publishing your plugin to npm ?