fix(component): remove class-level generic from PushPipe

[markostanimirovic]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ngrx/platform/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Documentation has been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

PushPipe doesn't work properly with strictTemplates set to true.

Closes #3114

What is the new behavior?

PushPipe works with strictTemplates set to true.

Does this PR introduce a breaking change?

[x] Yes
[ ] No

BREAKING CHANGE:

PushPipe no longer has a class-level generic type parameter.
This change will affect the use of PushPipe outside of component templates.

[ngrxbot]

Preview docs changes for d14d8b3 at https://previews.ngrx.io/pr3127-d14d8b3a/

[timdeschryver]

👍

[ocsurfnut]

Any chance of this getting in for next NgRx minor release?

[brandonroberts]

@ocsurfnut as its a breaking change, we won't include it in a minor release. It will be in the next major