chore: fix typo in karma.conf.js
Merge pull request #15 from btford/fix-typo

chore: fix typo in karma.conf.js
refactor: extract utility functions into a separate module
refactor: move _getInjectTokens into annotations.js
feat: inject super constructor

```js
class Child {
  @Inject(SuperConstructor);
  constructor(superConstructor) {
    superConstructor();
  }
}
```