Upgrade: Bump webpacker from 5.3.0 to 5.4.0
Upgrade: Bump webpacker from 5.3.0 to 5.4.0

Bumps [webpacker](https://github.com/rails/webpacker) from 5.3.0 to 5.4.0.
- [Release notes](https://github.com/rails/webpacker/releases)
- [Changelog](https://github.com/rails/webpacker/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rails/webpacker/compare/v5.3.0...v5.4.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
TheOdinProject/theodinproject,TheOdinProject/theodinproject,TheOdinProject/theodinproject,TheOdinProject/theodinproject