New features
[a3b4eae][1b58689][014a273][001619d][aa45d6d] Upgraded the application from 3.3 to 3.4 and 4.0 (@yceruto, @javiereguiluz)
[e04fc83] Made Doctrine repository as service and autowire/use it anywhere (@yceruto)
Bug fixes
[cede2cb] Added a APP_DEBUG fallback in console and front controller (@javiereguiluz)
[30673a8] Added MAILER_URL env var to Heroku config file (@javiereguiluz)
[7efe526] Used friendly command exceptions (@yceruto)
[341cea2] Improved code thanks to PhpStorm and Php Inspections (@javiereguiluz)
[ccb2cc7] Allowed PHP 7.2 & 7.3 and PHPUnit 6 (@VolCh)
[25f4a07] Removed unnecessary configuration for controllers (@yceruto)
[8aae8a2] Updated Slovenian translation (@petk)
[0142c89] Updated French translation (@flibustier)