build(deps): bump underscore from 1.13.6 to 1.13.7

Bumps [underscore](https://github.com/jashkenas/underscore) from 1.13.6 to 1.13.7.
- [Commits](jashkenas/underscore@1.13.6...1.13.7)

---
updated-dependencies:
- dependency-name: underscore
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]