Update tests

Author: danakt

src/lib.js

@@ -22,13 +22,13 @@ var uint8ToHex = function (ubyte) {
  * @returns {string} The hex string representation
  */
 var uint8ArrayToHex = function (buf) {
- var out = [];
+ var out = '';
 
  for (var i = 0; i < buf.length; i++) {
- out.push(uint8ToHex(buf[i]));
+ out += uint8ToHex(buf[i]);
  }
 
- return out.join('');
+ return out;
 };
 
 /**