Output node 12 requirement if not met

[moonray]

🐛 Bug Report

When using an older version of node you are simply met by Unexpected token { and nothing else happens. It would be helpful if a node version check is done before execution and preemptively exit with a notice to upgrade node.

Actual Behavior

When using node 8 (for instance), the script aborts with Unexpected token {.

Expected Behavior

An elegant warning.

Reproduction

1. use node 8
2. run npx tslint-to-eslint-config

[JoshuaKGoldberg]

Hi @moonray! I actually think it would be better to just go ahead and support Node 8 😄. Thoughts?

[JoshuaKGoldberg]

Mmhh, yes, I'll just do that. 😄

[LaloHao]

Could we get the warning in the meantime? I had to search on issues to find this out (using npx ...)

[JoshuaKGoldberg]

Support for Node 8 is merged into master. I'll release a new version very soon (likely tonight). Sorry for the lack of clarity here! 😢

[JoshuaKGoldberg]

@LaloHao @moonray published as 0.3.0! 🙌

If that doesn't work on your Node version, would you mind either posting here or filing a new issue with the warning? Thanks!