markdown: composer up not working for yii2

After composer up --prefer-dist I get

Problem 1
      - Installation request for yiisoft/yii2 2.0.14.2 -> satisfiable by yiisoft/yii2[2.0.14.2].
      - yiisoft/yii2 2.0.14.2 requires cebe/markdown ~1.0.0 | ~1.1.0 -> no matching package found.

This problem I get after your new release 1.2. https://github.com/cebe/markdown/releases/tag/1.2.0

3 days ago composer up worked fine.