Fixed CSS code processing and minification#62

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nomelodic wants to merge 2 commits intoskeeks-semenov:masterfrom

nomelodic:fix-css-minifier

Commits on Jan 15, 2021

Fixed building path to files for Yii version 2.0.39 and higher with non-empty BaseUrl. The issue was discussed here https://github.com/yiisoft/yii2/issues/18414
nomelodic
committed
Fixed CSS code processing and minification
nomelodic
committed