版本：12.2.0-rc.0
- https://cdn.bootcdn.net/ajax/libs/angular/12.2.0-rc.0/core-testing.umd.js
- https://cdn.bootcdn.net/ajax/libs/angular/12.2.0-rc.0/core-testing.umd.min.js
- https://cdn.bootcdn.net/ajax/libs/angular/12.2.0-rc.0/core.umd.js
- https://cdn.bootcdn.net/ajax/libs/angular/12.2.0-rc.0/core.umd.min.js