Less module is not working

Is this a bug report? - Yes.

Hi, I'm using custom-react-scripts 0.2.2. Seems less moduling is not working. Here are my env variables:
```bash
REACT_APP_DECORATORS=true
REACT_APP_LESS=true
REACT_APP_CSS_MODULES=true
REACT_APP_LESS_MODULES=true
REACT_APP_CSS_MODULE_CLASSNAME_TEMPLATE='module-[sha512:hash:base32]-[name]-[local]'
```