Import require completion regexp incomplete

[blakeembrey]

Noticed it while reviewing #805, but the regexp \w+ isn't 100% complete for valid JavaScript identifiers. For instance, a $ is allowed (also various UTF8 characters). Maybe there's something that exists for this, I know I've done the same RegExp in a number of other projects.

[github-actions]

This issue has been marked as stale because it did not have any activity for the last 90 days or more. Remove the stale label or comment or this will be closed in 14 days