Css module import of local file doesn't work

[Fatme]

Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):

• CLI: 6.2.x

• Cross-platform modules: 6.2.x

• Android Runtime: 6.2.x

• iOS Runtime: 6.2.x

• Plugin(s):

• Node.js:

• Please, attach your package.json and webpack.config.js as these configurations are usually critical for investigating issues with webpack

Describe the bug
The following syntax doesn't work anymore after updating to NativeScript 6.2:

@import 'common.css';

To Reproduce

1. tns create myApp --ng
2. cd myApp && cd src && touch common.css
3. Open app.css and add @import 'common.css';
4. tns run ios
   The following error will be shown:

ERROR in ./app.css
Module not found: Error: Can't resolve 'common.css' in '/Users/<myuser>/Work/nativescript-cli/scratch/myApp/src'
 @ ./app.css 3:53-141
 @ ../node_modules/nativescript-dev-webpack/load-application-css-angular.js
 @ ./main.ts
Executing webpack failed with exit code 2.

Expected behavior

The described syntax is working with NativeScript 6.1 and it should work with NativeScript 6.2. as well.

Additional context

Workaround:
The import should be changed with relative path e.g. @import './common.css'

It seems that after changing css-loader with css2json-loader, module imports of .css file doesn't work anymore and only relative imports are supported.

The issue is not reproduced with .scss files.