Fixed capitalization, tests

src/JWTUtil.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace NoccyLabs\SimpleJWT;
+
+
+class JWTUtil
+{
+    public static function encode($data) {
+        return rtrim(str_replace(['+', '/'], ['-', '_'], base64_encode($data)), "=");
+    }
+    
+    public static function decode($data) {
+        return base64_decode(str_replace(['-', '_'], ['+', '/'], $data));
+    }
+
+}