Bump @types/sass-graph from 2.1.4 to 2.1.5

Bumps [@types/sass-graph](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/sass-graph) from 2.1.4 to 2.1.5.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/sass-graph)

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

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