clean-css-cli 5.3

[jakubpawlowicz]

Hey folks!

Version 5.3 is out with a new feature, where --batch and --output used together will put optimized files under output path, see commit for details - faf9ed0

Also batch processing and source maps got couple fixes so you should expect this combination of options to behave better.

Enjoy! 🎉 🍺