Bump gulp-size from 4.0.1 to 5.0.0

Bumps [gulp-size](https://github.com/sindresorhus/gulp-size) from 4.0.1 to 5.0.0.
- [Release notes](https://github.com/sindresorhus/gulp-size/releases)
- [Commits](sindresorhus/gulp-size@v4.0.1...v5.0.0)

---
updated-dependencies:
- dependency-name: gulp-size
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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