Bump underscore and @types/underscore

Bumps [underscore](https://github.com/jashkenas/underscore) and [@types/underscore](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/underscore). These dependencies needed to be updated together.

Updates `underscore` from 1.13.6 to 1.13.7
- [Commits](jashkenas/underscore@1.13.6...1.13.7)

Updates `@types/underscore` from 1.11.9 to 1.11.15
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/underscore)

---
updated-dependencies:
- dependency-name: underscore
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: "@types/underscore"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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