Bumps [terser](https://github.com/terser/terser) from 5.8.0 to 5.9.0.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/compare/v5.8.0...v5.9.0)

---
updated-dependencies:
- dependency-name: terser
  dependency-type: direct:development
  update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>