Incompatible with rxjs 6.0.0

[tolvaly]

Could you fix the imports for rxjs 6.0.0 ?

rxjs changed the import strategy:

v6.0.0-alpha.1 changelog

• creation functions: All create functions such as of, from, combineLatest and fromEvent should now be imported from rxjs/create.

• operators: Pipeable operators must now be imported from rxjs like so: import { map, filter, switchMap } from 'rxjs/operators';. No deep imports.

• deep imports: Can no longer deep import top-level types such as rxjs/Observable, rxjs/Subject, rxjs/ReplaySubject, et al. All imports should be done directly from rxjs, for example: import { Observable, Subject } from 'rxjs';

I suggest to use version numbering used by rxjs in the future release

[stephen-moyer]

Closed by #8