Async methods highlight

[EugenePisotsky]

Async highlight is not working for decorated methods (Atom, atom-typescript 8.1)

    @Action('/promise')
    public async asyncResponse(): Promise<Object> {
        return {
            promiseResult: 'promise is ok'
        }
    }

also, class keyword now looks like type in this example:

export class IndexController extends AppController {
...

original issue: TypeStrong/atom-typescript#819

[anubmat]

For part 1, is this being declared outside a class declaration, because the problem does not seem to be 'async', looks like it is with async and public being used outside class definition.
For part 2, Needs more info. It looks good to me now.

[sheetalkamat]

Fixed by #257