Upgrade assets-webpack-plugin to ^7.1, leverage integrity calculations to assets-webpack-plugin and webpack-subresource-integrity#1341

Kocal wants to merge 1 commit intosymfony:mainsymfony/webpack-encore:mainfrom

Kocal:assets-webpack-plugin-7.1Kocal/webpack-encore:assets-webpack-plugin-7.1Copy head branch name to clipboard