Depend on `stripmq` npm package

This is assuming my changes in https://github.com/jkenlooper/stripmq/pull/3 once that PR is merged and the package is updated on npm, we can merge this.

### Todos

- [x] Wait for https://github.com/jkenlooper/stripmq/pull/3 to be merged.
- [x] Update `stripmq` version in `package.json`.
- [ ] Extract Broccoli plugin to strip MQs. (Optional)