chore(package.json): upgrade karma-requirejs to v0.2.0

Fixes peerDependency issue:

```
npm ERR! peerinvalid The package karma-requirejs does not satisfy its siblings' peerDependencies requirements!
npm ERR! peerinvalid Peer karma@0.10.10 wants karma-requirejs@~0.2.0

```

Closes #129