message: docs(toPromise): replace just() with of() in examples
diff: @@ -12,7 +12,7 @@ export function toPromise<T>(this: Observable<T>, PromiseCtor: typeof Promise):
  * @example
  * // Using normal ES2015
  * let source = Rx.Observable
  - * .just(42)
  + * .of(42)
  * .toPromise();
  *
  * source.then((value) => console.log('Value: %s', value));
  @@ -41,7 +41,7 @@ export function toPromise<T>(this: Observable<T>, PromiseCtor: typeof Promise):
  *
  * // Setting via the method
  * let source = Rx.Observable
  - * .just(42)
  + * .of(42)
  * .toPromise(RSVP.Promise);
  *
  * source.then((value) => console.log('Value: %s', value));
  