Improve node compatibility

[marktani]

The minimum required node version currently is 8+.

If you try to get started with a boilerplate of an older version, you get this:

Here are potential improvements compared to the current situation:

• add a friendly note when the above error occurs, that includes actionable steps to move on (for example link to instructions how to upgrade node version)
• implement compatibility with older node versions

[vivek12345]

@marktani I would like to take this up. Saw the index.js file inside basic/.install and it seems the problem is because we are using async await which is not supported for lower node versions.

If I have to fix it with promises, should I go ahead?
Also how do I test if my solution works or not?