Update bower.json
Update bower.json

This will probably fix the grunt bower-install issue.
anthonyhplo/angular-charts,471685249/angular-charts,AntonNarkevich/angular-charts,471685249/angular-charts,gajdusek-egston/angular-charts,lakhansamani/angular-charts,AntonNarkevich/angular-charts,chinmaymk/angular-charts,chinmaymk/angular-charts,gajdusek-egston/angular-charts,lakhansamani/angular-charts,AndreasZeissner/angular-charts,anthonyhplo/angular-charts,AndreasZeissner/angular-charts