Extract core and put as dependency

Author: Sena

vendor_alt/autoload.php

@@ -0,0 +1,15 @@
+<?php
+spl_autoload_register(function($class) {
+    $prefix = 'Sounoob\\pagseguro\\';
+    
+    if ( ! substr($class, 0, strlen($prefix) -1) === $prefix) {
+        return;
+    }
+    
+    $class = substr($class, strlen($prefix));
+    $location = __DIR__ . '/../source/' . str_replace('\\', '/', $class) . '.php';
+    
+    if (is_file($location)) {
+        require_once($location);
+    }
+});