Fix trailing comma (#247)

* added .prettierrc.json
* modified:   .gitignore
* yarn run format
* fix check format workflow

plugins/filenameParser/filenameParser.js

@@ -187,7 +187,7 @@ function cleanFilename(name) {
   ];
   var regExp = new RegExp(
     "(_|[^\\w\\d]|^)(" + blockList.join("|") + ")(_|[^\\w\\d]|$)",
-    "i",
+    "i"
   );
   while (regExp.test(name)) {
     name = name.replace(regExp, "$1$3");