Bump webpack-dev-middleware and @angular-devkit/build-angular in /knox-webshell-ui#911

dependabot[bot] wants to merge 1 commit intomasterapache/knox:masterfrom

dependabot/npm_and_yarn/knox-webshell-ui/multi-c302ea0db4apache/knox:dependabot/npm_and_yarn/knox-webshell-ui/multi-c302ea0db4Copy head branch name to clipboard