Update pubspec.yaml dependency on package:analyzer to >=0.27.0
Update pubspec.yaml dependency on package:analyzer to >=0.27.0

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=129804248

chalin/angular2,matanlurey/angular,kevmoo/angular,kevmoo/angular,angulardart/angular,matanlurey/angular,angulardart/angular,chalin/angular2,kevmoo/angular,angulardart/angular,matanlurey/angular,chalin/angular2