Drop `webpack-cli` 4 support, only `webpack-cli` ^5.1.4 is supported#1307

Kocal merged 2 commits intosymfony:mainsymfony/webpack-encore:mainfrom

Kocal:feat/GH-1294-drop-webpack-cli-4Kocal/webpack-encore:feat/GH-1294-drop-webpack-cli-4Copy head branch name to clipboard