Bump webpack-dev-middleware, @angular-devkit/build-angular and ngx-build-plus in /zeppelin-web-angular#16

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dependabot/npm_and_yarn/zeppelin-web-angular/webpack-dev-middleware-and-angular-devkit/build-angular-and-ngx-build-plus-5.3.4Meesho/zeppelin:dependabot/npm_and_yarn/zeppelin-web-angular/webpack-dev-middleware-and-angular-devkit/build-angular-and-ngx-build-plus-5.3.4Copy head branch name to clipboard