Angular 18 migration

[BhuiyanSaif18]

Please check if the PR fulfills these requirements

• [x] The commit message follows our guidelines: https://github.com/moribvndvs/ng2-idle/blob/master/CONTRIBUTING.md#pr
• [x] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x")

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[x] Other : Update deps version

What is the current behavior? (You can also link to an open issue here)

What is the new behavior?

Does this PR introduce a breaking change? (check one with "x")

[ ] Yes
[x] No

If this PR contains a breaking change, please describe the impact and migration path for existing applications: ...

Other information:

[moribvndvs]

Hi, @BhuiyanSaif18. @ng-idle/core and keepalive 15 w/ Angular 17 support are out the door, again, thanks. Naturally, however, that means there are some merge conflicts since I squashed and merged. I'd rebase off the latest master and try again.

[hey24sheep]

@BhuiyanSaif18 can you generate a fresh PR for Angular 18 as well that will be great. Again, thanks for your help. Appreciate it a lot.