The root CSSO package extended node js engine support to version 10 and above. Please make this change to your package as well. https://github.com/css/csso/commit/f1c6aeb69065a94801e3cfe9621b24509c18140f
The root CSSO package extended node js engine support to version 10 and above. Please make this change to your package as well.
css/csso@f1c6aeb