chore: tidy things up and fix typos

lib/utils/wrappers/NodeCache.js

@@ -1,12 +1,9 @@
 'use strict';
+
 const fs = require('fs');
 
 class NodeCache {
-  constructor() {
-  }
-
   /**
-   *
    * @param {string} key
    * @returns {Promise<ArrayBuffer>}
    */
@@ -15,7 +12,6 @@ class NodeCache {
   }
 
   /**
-   *
    * @param {string} key
    * @param {ArrayBuffer} data
    * @returns {Promise<void>}
@@ -23,19 +19,21 @@ class NodeCache {
   async write(key, data) {
     // Make sure the directory exists
     const parts = key.split('/').slice(0, -1);
+    
     let current = '';
-    for (let i = 0; i < parts.length; i++) {
-      current += `${parts[i]}/`;
+    
+    for (const part of parts) {
+      current += `${part}/`;
+      
       if (!(await this.exists(current))) {
         await fs.promises.mkdir(current);
       }
     }
-
+    
     return await fs.promises.writeFile(key, data);
   }
 
   /**
-   *
    * @param {string} key
    * @returns {Promise<boolean>}
    */
@@ -44,7 +42,6 @@ class NodeCache {
   }
 
   /**
-   *
    * @param {string} key
    * @returns {Promise<void>}
    */