fix: 修复获取getWxacodeUnlimit接口的默认参数的bug

Author: shinn-lancelot

src/DefaultParamInfo.php

@@ -21,7 +21,7 @@
         'line_color'=>array('r'=>0, 'g'=>0, 'b'=>0),
         'is_hyaline'=>false
     ),
-    'getWXACodeUnlimit'=>array(
+    'getWxacodeUnlimit'=>array(
         'scene'=>'',
         'page'=>'page/index/index',
         'width'=>430,