Add support for newer node versions

The latest version of Node supported currently is 12.0.0, while the current Node LTS is 12.16.2, and the latest release is 14.0.0, and the feature support for versions later than 12.0.0 would be appreciated!

This is for @glitch_support!

This would be indeed very helpful, as the latest PNPM major release requires Node 12.17 and above.

The latest supported version is node 6.17.1 through 14.x.
Look here for more information

They only support major versions and a bunch of minor ones as well, but not for 12.

PNPM needs 12.17 and above, but as glitch forces npm on 14.x, they are irrelevant.