版本：12.1.0-next.6
- https://cdn.bootcdn.net/ajax/libs/angular/12.1.0-next.6/core-testing.umd.js
- https://cdn.bootcdn.net/ajax/libs/angular/12.1.0-next.6/core-testing.umd.min.js
- https://cdn.bootcdn.net/ajax/libs/angular/12.1.0-next.6/core.umd.js
- https://cdn.bootcdn.net/ajax/libs/angular/12.1.0-next.6/core.umd.min.js