chore(deps-dev): bump gulp-header from 1.8.9 to 2.0.9

Bumps [gulp-header](https://github.com/tracker1/gulp-header) from 1.8.9 to 2.0.9.
- [Changelog](https://github.com/gulp-community/gulp-header/blob/master/changelog.md)
- [Commits](gulp-community/gulp-header@v1.8.9...v2.0.9)

---
updated-dependencies:
- dependency-name: gulp-header
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]