fixed coding standard

Author: stlrnz

src/Lock.php

@@ -49,15 +49,15 @@ public function get($name)
 
     public function set($name, $data)
     {
-        if (!array_key_exists($name, $this->lock) || $data !== $this->lock[$name]) {
+        if (!\array_key_exists($name, $this->lock) || $data !== $this->lock[$name]) {
             $this->lock[$name] = $data;
             $this->changed = true;
         }
     }
 
     public function remove($name)
     {
-        if (array_key_exists($name, $this->lock)) {
+        if (\array_key_exists($name, $this->lock)) {
             unset($this->lock[$name]);
             $this->changed = true;
         }