Fix mocha version

Updated dev deps, updated csscomb and tests

Updated deps

Allow defining `rem` before including stylobate

Update .travis.yml

v0.24.2: Fixes selector order problems in `icon` kind, fixes yandex-ui/stylobate-islands#75

v0.24.1

Removed cache from modal (CSS order issue)

v0.24.0

Added `stylobate_this` function to return empty `$this` to allow param getters in called functions

Better handling of defaulted params

Fixed merging with parent

Added `data:` to urls detecting

Major refactoring and changes: using proper params objects

Proper version of utilus