Bump webpack from 4.42.0 to 4.42.1 in /assets (#534)

Bumps [webpack](https://github.com/webpack/webpack) from 4.42.0 to 4.42.1.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v4.42.0...v4.42.1)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>