chore(deps-dev): bump @types/lodash.merge from 4.6.7 to 4.6.9

Bumps [@types/lodash.merge](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/lodash.merge) from 4.6.7 to 4.6.9.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/lodash.merge)

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

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

Author: dependabot[bot]