upd: Base32 class and base32 test

src/base32.js

@@ -4,12 +4,23 @@
  *  @author   : Gin (gin.lance.inside@hotmail.com)
  */
 
- export class Base32 {
-    static decode() {
-        return "static Base32.decode";
+const  nibbler = require("./nibbler/nibbler");
+
+export class Base32 {
+    /*＊
+     * Base32 decode function
+     *
+     * @param {secret}
+     * @type {String} 
+     * @desc input string
+     *
+     * @return {String}
+     */
+    static decode(secret) {
+        return nibbler.b32decode(secret);
     }
 
     static random_gen() {
         return "static Base32.random_gen";
     }
- }
+}