chore(deps): update phantomjs-prebuilt to 2.1.6
chore(deps): update phantomjs-prebuilt to 2.1.6

ghpabs/angular2-seed,ghpabs/angular2-seed-project,ghpabs/angular2-seed,ghpabs/angular2-seed,ghpabs/angular2-seed-project,ghpabs/angular2-seed-project