Bump diff and @types/diff

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

Updates `diff` from 5.0.0 to 5.1.0
- [Changelog](https://github.com/kpdecker/jsdiff/blob/master/release-notes.md)
- [Commits](https://github.com/kpdecker/jsdiff/commits)

Updates `@types/diff` from 5.0.2 to 5.0.5
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/diff)

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

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