Run migrations for angular v21

fix typo in workflow

Merge pull request #61 from ngxp/angular-15-update

chore: update to angular 15

bugfix: add missing peerDependencies

- add @angular/platform-browser-dynamic to peerDepencies
- add rxjs7 to peerDependencies
- use jest-marbles instead of jasmine-marbles to ensure compatibility with rxjs7