Alan Agius 83602515fa fix(@angular-devkit/build-angular): explicitly set compilation target in test configuration
When not set, and browserslist returns no reesults due to the file being empty or commented. Webpack will generate invalid code because it doesn't know which enviorment we want to target.

```diff
- (self["webpackChunktest_app"] = self["webpackChunktest_app"] || []).push([["vendor"],{

/***/ 8583:
```

Closes #21111
2021-06-11 09:51:25 -04:00
..