Version 2.12.8
- Change License year to 2020.
- Change running dependence of
symfony/processto allow version^0.5 - Change development dependence
phpstan/phpstan-shimtophpstan/phpstan(versions^0.9to^0.11)
symfony/process to allow version ^0.5phpstan/phpstan-shim to phpstan/phpstan (versions ^0.9 to ^0.11)