feat(Angular): update to v21

[AlDrag]

Ran npx nx migrate latest. Had to manually add standalone: false to
components created in test files, otherwise was all automatic.

Ran manual steps from Github on-push-or-pull Actions and is all passing.

[lexasq]

Hi @AlDrag thnks for your contriubution, but this won't make lib to support angular 21, we got to update peerDependencies in the lib itself.
provideZoneChangeDetection() is not required since AppComponent is standalone: false.
Please update lib peerDependencies, and for possible

[AlDrag]

@lexasq I've updated the peer dependencies to Angular v21. Sorry about that.
I've also removed provideZoneChangeDetection(). I didn't read the docs properly.

Thanks.

[lexasq]

Thanks again, probably one last thing left is to update test run, as we update Jest version here.
`> ng2-file-upload-demo@9.0.0 test

nx run-many --target=test --all

NX Running target test for project ng2-file-upload

× nx run ng2-file-upload:test
NX ● Validation Error:

    Test environment jest-environment-jsdom cannot be found. Make sure the testEnvironment configuration option points to an existing node module.

    Configuration Documentation:
    https://jestjs.io/docs/configuration


  As of Jest 28 "jest-environment-jsdom" is no longer shipped by default, make sure to install it separately.
  Pass --verbose to see the stacktrace.

`

[AlDrag]

I just realised I never actually ran npm install at the root. Getting conflicts.

I think we are blocked on this PR being merged for ngx-bootstrap valor-software/ngx-bootstrap#6788

[lexasq]

Yeah, that would be my chore. I'll work it out

[AlDrag]

Sweet, thank you.

The tests all pass on my end otherwise, so not sure why you're getting that jest error. But I'll reconfirm when ngx-bootstrap is updated.

[atpanos]

any update here? ngx-bootstrap was updated.

[AlDrag]

@lexasq I've updated ngx-bootstrap.