ngrxPush not working with strictTemplate checks

[ocsurfnut]

Minimal reproduction of the bug/regression with instructions:

Use the | ngrxPush pipe with an observable typed differently than the @Input().

Expected behavior:

Error Type 'X' is not assignable to type 'Y'.

Actual behavior:

No type error in IDE or from ng build.

Versions of NgRx, Angular, Node, affected browser(s) and operating system(s):

Versions 11 and 12, not OS-specific.

Other information:

Copying the ngrxPush source code locally and experimenting, I've isolated it to this line. If export class PushPipe<S> ... is changed to export class PushPipe<S = any> ..., the type checking starts working.

Working from there, I confirmed that any pipe class with a generic argument is skipped in strict template checking. I created a Stackblitz to demonstrate the base issue, which seems specific to Angular, not NgRx. However, I couldn't find any related issues with Angular or otherwise.

Without understanding the need for this generic parameter, I'm not sure if this change is desirable. I noticed the Angular async pipe simply types the internal value as any, and does not use a generic on the class.

I would be willing to submit a PR to fix this issue

[x] Yes (Assistance is provided if you need help submitting a pull request)
[ ] No

[markostanimirovic]

Generic parameter here seems like a surplus to me too.

Reproduction with ngrxPush