Jest

Even with the steps from https://github.com/developit/workerize-loader#testing (creating workerize-jest.js file and adding it to transform section of jest config), seems like Jest still can't understand my 'workerize-loader!' imports.

Versions

```
"workerize-loader": "^1.2.1"
"jest": "^25.5.4"
```

Any idea, why?
