版本：12.0.0-next.1
- https://cdn.bootcdn.net/ajax/libs/angular/12.0.0-next.1/core-testing.umd.js
- https://cdn.bootcdn.net/ajax/libs/angular/12.0.0-next.1/core-testing.umd.min.js
- https://cdn.bootcdn.net/ajax/libs/angular/12.0.0-next.1/core.umd.js
- https://cdn.bootcdn.net/ajax/libs/angular/12.0.0-next.1/core.umd.min.js