fix(typescript-estree): reduce bundle footprint of tsutils

[thorn0]

If you don't need everything offered by this package, you can select what should be imported.

-- from https://www.npmjs.com/package/tsutils

[typescript-eslint]

Thanks for the PR, @thorn0!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

---

🙏 Please, if you or your company is finding typescript-eslint valuable, help us sustain the project by sponsoring it transparently on https://opencollective.com/typescript-eslint. As a thank you, your profile/company logo will be added to our main README which receives thousands of unique visitors per day.

[bradzacher]

I didn't think about how big it would be for your web versions.

Thanks for this - LGTM

[codecov]

Codecov Report

Merging #1177 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #1177   +/-   ##
=======================================
  Coverage   93.99%   93.99%           
=======================================
  Files         120      120           
  Lines        5195     5195           
  Branches     1440     1440           
=======================================
  Hits         4883     4883           
  Misses        178      178           
  Partials      134      134

Impacted Files	Coverage Δ
packages/typescript-estree/src/convert-comments.ts	100% <100%> (ø)	⬆️