Add missing angular/router to peerDependencies

[klaascuvelier]

Description

auth0-angular has a dependency on angular/router that is not specified in the peerDependencies.

References

• https://github.com/auth0/auth0-angular/search?q=angular%2Frouter
• https://twitter.com/MarkWhitfeld/status/1460231742774722562

Testing

Describe how this can be tested by reviewers. Be specific about anything not tested and reasons why. If this library has unit and/or integration testing, tests should be added for new functionality and existing tests should complete without errors.

Please include any manual steps for testing end-to-end or functionality not covered by unit/integration tests.

Also include details of the environment this PR was developed in (language/platform/browser version).

• This change adds test coverage for new/changed/fixed functionality

Checklist

• I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not master

[frederikprijck]

Thanks!