chore(deps): update @angular to v8.2.8

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@angular/animations	dependencies	patch	8.2.7 -> 8.2.8
@angular/common	dependencies	patch	8.2.7 -> 8.2.8
@angular/compiler	dependencies	patch	8.2.7 -> 8.2.8
@angular/core	dependencies	patch	8.2.7 -> 8.2.8
@angular/forms	dependencies	patch	8.2.7 -> 8.2.8
@angular/platform-browser	dependencies	patch	8.2.7 -> 8.2.8
@angular/platform-browser-dynamic	dependencies	patch	8.2.7 -> 8.2.8
@angular/router	dependencies	patch	8.2.7 -> 8.2.8

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Release Notes

angular/angular

### [`v8.2.8`](https://togithub.com/angular/angular/blob/master/CHANGELOG.md#​828httpsgithubcomangularangularcompare827828-2019-09-25) [Compare Source](https://togithub.com/angular/angular/compare/8.2.7...8.2.8) This release contains various API docs improvements.

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