chore(deps-dev): bump ng-packagr from 5.5.0 to 5.5.1
chore(deps-dev): bump ng-packagr from 5.5.0 to 5.5.1

Bumps [ng-packagr](https://github.com/ng-packagr/ng-packagr) from 5.5.0 to 5.5.1.
- [Release notes](https://github.com/ng-packagr/ng-packagr/releases)
- [Changelog](https://github.com/ng-packagr/ng-packagr/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ng-packagr/ng-packagr/compare/v5.5.0...v5.5.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
willsoto/ng-chartist,paradox41/angular2-chartist,paradox41/angular2-chartist,willsoto/ng-chartist,willsoto/ng-chartist,paradox41/angular2-chartist