chore(deps): bump uglify-js from 2.2.5 to 3.14.1

Bumps [uglify-js](https://github.com/mishoo/UglifyJS) from 2.2.5 to 3.14.1.
- [Release notes](https://github.com/mishoo/UglifyJS/releases)
- [Commits](mishoo/UglifyJS@v2.2.5...v3.14.1)

---
updated-dependencies:
- dependency-name: uglify-js
  dependency-type: indirect
...

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Author: dependabot[bot]