Bump webpack-dev-server from 2.11.5 to 3.1.11#8

dependabot[bot] wants to merge 2 commits intomasterShaolans/prettier-java-playground:masterfrom

dependabot/npm_and_yarn/webpack-dev-server-3.1.11Shaolans/prettier-java-playground:dependabot/npm_and_yarn/webpack-dev-server-3.1.11Copy head branch name to clipboard