Bump diff and mocha

Bumps [diff](https://github.com/kpdecker/jsdiff) and [mocha](https://github.com/mochajs/mocha). These dependencies needed to be updated together.

Updates `diff` from 1.4.0 to 5.0.0
- [Release notes](https://github.com/kpdecker/jsdiff/releases)
- [Changelog](https://github.com/kpdecker/jsdiff/blob/master/release-notes.md)
- [Commits](kpdecker/jsdiff@v1.4.0...v5.0.0)

Updates `mocha` from 2.3.4 to 10.0.0
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@2.3.4...v10.0.0)

---
updated-dependencies:
- dependency-name: diff
  dependency-type: indirect
- dependency-name: mocha
  dependency-type: direct:development
...

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

Author: dependabot[bot]