fix: createTempFolder

Author: aminya

lib/grammar-utils.js

@@ -25,6 +25,14 @@ const GrammarUtils = {
     return temp.path({ dir: this.tempFilesDir, prefix, suffix: extension })
   },
 
+  // Public: Create a temporary directory
+  //
+  // Returns the {String} filepath of the new folder
+  createTempFolder(prefix = "") {
+    this.ensureTempDir()
+    return temp.mkdirSync({ dir: this.tempFilesDir, prefix })
+  },
+
   // Public: Create a temporary file with the provided code
   //
   // * `code`    A {String} containing some code