Bump webpack-dev-middleware and webpack-dev-server#4

dependabot[bot] wants to merge 1 commit into

mainsofiane-abou-abderrahim/javascript-performance-and-optimizations:mainfrom

dependabot/npm_and_yarn/webpack-dev-middleware-and-webpack-dev-server--removedsofiane-abou-abderrahim/javascript-performance-and-optimizations:dependabot/npm_and_yarn/webpack-dev-middleware-and-webpack-dev-server--removedCopy head branch name to clipboard