Bump webpacker from 3.0.1 to 3.0.2
Bump webpacker from 3.0.1 to 3.0.2

Bumps [webpacker](https://github.com/rails/webpacker) from 3.0.1 to 3.0.2.
- [Changelog](https://github.com/rails/webpacker/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rails/webpacker/compare/v3.0.1...v3.0.2)
coreyja/glassy-collections,coreyja/glassy-collections,coreyja/glassy-collections