Bump terser from 4.0.2 to 4.8.1

Bumps [terser](/~https://github.com/terser/terser) from 4.0.2 to 4.8.1.
- [Release notes](/~https://github.com/terser/terser/releases)
- [Changelog](/~https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](/~https://github.com/terser/terser/commits)

---
updated-dependencies:
- dependency-name: terser
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>