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/runGulp.js

@@ -21,7 +21,7 @@ export default async function ({ watch, production }) {
       log(chalk.green('Finished: %s'), chalk.reset(name));
       taskList[uid] = false;
 
-      if (Object.values(taskList).filter(b => b).length === 0) {
+      if (Object.values(taskList).filter((b) => b).length === 0) {
         if (watch) {
           gulpTasks.watch();
         }