Fix bug when using multiple include keys
Upgrade qs
Bump version
Merge branch 'release/2.2.2' into production
Merge tag 'v2.2.2'

2.2.2
Merge pull request #203 from lchenay/patch-5

Fix bug when using multiple include keys on related method
Merge branch 'feature/plugins' of github.com:fabien/loopback-datasource-juggler into fabien-feature/plugins
Clean up the mixin processing
Cleanup mixin tests