3.9.1

• #50

update clean-css dep to 4.1.9

https://github.com/jakubpawlowicz/clean-css/releases/tag/v4.1.9

update clean-css dep to 4.1.8

https://github.com/jakubpawlowicz/clean-css/releases/tag/v4.1.8

update clean-css dep to 4.1.7

https://github.com/jakubpawlowicz/clean-css/releases/tag/v4.1.7

update clean-css dep to 4.1.6

https://github.com/jakubpawlowicz/clean-css/releases/tag/v4.1.6

update clean-css dep to 4.1.5

https://github.com/jakubpawlowicz/clean-css/releases/tag/v4.1.5

inlined imports should be rebased to current file

#44

Fix #43 - dep update

clean-css => 4.1.3

Fixes #42

rebase: false by default

#42

3.3.0

Fixing rebasing as seen at clean-css/clean-css#937. Update clean-css to 4.1.2