v0.12.1

Bumped! 🏝️

Diff: v0.12...v0.12.1

Changes:

• Open v0.13 [98805df] (@f3l1x)
• Composer: minimal PHP 7.3 [06746db] (@f3l1x)
• Travis -> Github Actions [9bed57a] (@f3l1x)
• Readme: modernize [aefa4d0] (@f3l1x)
• Bin: show installed coding standard only if CI env is not presented [d59b185] (@f3l1x)
• Composer: allow PHP 7.2 [20492ee] (@f3l1x)
• CI: update php matrix [a43584b] (@f3l1x)