Bump underscore from 1.9.1 to 1.12.1 (#618)

Bumps [underscore](https://github.com/jashkenas/underscore) from 1.9.1 to 1.12.1.
- [Release notes](https://github.com/jashkenas/underscore/releases)
- [Commits](jashkenas/underscore@1.9.1...1.12.1)

---
updated-dependencies:
- dependency-name: underscore
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>