upgrade dep:

css-loader 0.28->3.5
del 4.1->5.1
eslint 5.18->6.8
eslint-config-airbnb 17.1->18.1
eslint-loader 2.1->4.0
file-loader 2.0->6.0
fs.extra 8.0->9.0
gulp 2.0->3.0
gulp-nunjucks 4.0->5.0
json-loader 0.5->Removed
style-loader 0.23->1.1
uglifyjs-webpack-plugin 1.3->2.2
yargs 13.2->15.3
katex 0.10->0.11
react-monaco-editor 0.35->0.36
timeage-react 1.2->3.0
timeago.js 3.0->4.0
uuid 3.3->7.0

ui/build/plugins/webpackStaticManifestPlugin.js

@@ -15,7 +15,7 @@ export default class StaticManifestPlugin {
         .map((asset) => {
           const { name } = asset;
           // Skip files listed in ignore
-          if (_.some(this.ignore, ignorePattern => name.indexOf(ignorePattern) > -1)) {
+          if (_.some(this.ignore, (ignorePattern) => name.indexOf(ignorePattern) > -1)) {
             return null;
           }
           // Skip calculating hash for names like ?xxxx