* feat(angular): upgrade Angular to v12.0.0-rc.3
* feat(angular): target Nx v12.4.0-beta.0 for Angular v12.0.0-rc.0 upgrade
* fix(angular): use defaultConfiguration if no other configuration is passed
* cleanup(angular): sync migration folder name to target version
* fix(repo): creating custom schema flattener for docs
* chore(repo): amend yarn.lock
* feat(angular): update angular storybook to use webpack 5
* fix(angular): add legacy peer deps for angular+jest
* fix(angular): move migrations to 12.3.0-rc.0
Co-authored-by: Zack DeRose <zack.derose@gmail.com>
Co-authored-by: Jason Jean <jasonjean1993@gmail.com>
