Bump yargs-parser, webpack and webpack-dev-server#30

dependabot[bot] wants to merge 1 commit intomainmauriballes/binary-tree:mainfrom

dependabot/npm_and_yarn/yargs-parser-and-webpack-and-webpack-dev-server--removedmauriballes/binary-tree:dependabot/npm_and_yarn/yargs-parser-and-webpack-and-webpack-dev-server--removedCopy head branch name to clipboard