npm: update grunt-karma to 2.0.0
npm: update grunt-karma to 2.0.0

- versions' scheme changed
- few bugfixes

ref: https://github.com/karma-runner/grunt-karma/blob/master/CHANGELOG.md

sayanee/angularjs-pdf,simobasso/angularjs-pdf,sayanee/angularjs-pdf,simobasso/angularjs-pdf