Run clear() on attribute changes

This change will run the clear() function to empty any caches if an attribute has been changed, added, or removed.

Author: mallardduck

src/PHPHtmlParser/Dom/AbstractNode.php

@@ -305,6 +305,9 @@ public function setAttribute($key, $value)
     {
         $this->tag->setAttribute($key, $value);
 
+        //clear any cache
+        $this->clear();
+        
         return $this;
     }
 
@@ -318,6 +321,9 @@ public function setAttribute($key, $value)
     public function removeAttribute($key)
     {
         $this->tag->removeAttribute($key);
+        
+        //clear any cache
+        $this->clear();
     }
 
     /**
@@ -329,8 +335,10 @@ public function removeAttribute($key)
     public function removeAllAttributes()
     {
         $this->tag->removeAllAttributes();
+        
+        //clear any cache
+        $this->clear();
     }
-
     /**
      * Function to locate a specific ancestor tag in the path to the root.
      *