rxjs/finnish doesn't detect implicitly typed Observable functions

[leroydev]

The rxjs/finnish rule flags me to end FunctionExplicitlyReturningObservable with a $ but doesn't do the same for FunctionImplicitlyReturningObservable. It seems like this is because the rule doesn't detect functions implicitly having an Observable return type?

import { Observable, of } from 'rxjs';

function FunctionImplicitlyReturningObservable() {
  return of([]);
}

function FunctionExplicitlyReturningObservable(): Observable<[]> {
  return of([]);
}

If this is seen as a problem I could try to make a PR to fix this.

Thanks in advance!

[JasonWeinzierl]

Hello,

My fork eslint-plugin-rxjs-x has a fix published for this as of JasonWeinzierl#185 .