Chore(deps): Bump underscore from 1.9.2 to 1.12.1 in /src

Bumps [underscore](https://github.com/jashkenas/underscore) from 1.9.2 to 1.12.1.
- [Release notes](https://github.com/jashkenas/underscore/releases)
- [Commits](https://github.com/jashkenas/underscore/compare/1.9.2...1.12.1

)

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

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