Angular 9

[taokakao]

Pls, upgrade lib to be compliant with Ivy and Angular 9.

[nkyordy]

Using angular 9.1.x, and 6.0.1, I've had no issues building using the --prod flag.

[ethan-far]

First of all, thanks for a great package !

I'd like to also mention that now Angular 10 is out there. Even if the package is fully compatible, it would be nice if you could update the angular dependencies to reflect that, so that using "ng update" wouldn't require the "--force" option.

[itsdevdom]

Released with 7.0.0.