Bump webpack-merge from 5.0.9 to 5.3.0 (#15130)

Bumps [webpack-merge](https://github.com/survivejs/webpack-merge) from 5.0.9 to 5.3.0.
- [Release notes](https://github.com/survivejs/webpack-merge/releases)
- [Changelog](https://github.com/survivejs/webpack-merge/blob/master/CHANGELOG.md)
- [Commits](https://github.com/survivejs/webpack-merge/compare/v5.0.9...v5.3.0

)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>