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

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)

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