Added constructor for SetOperation.

Signed-off-by: Dan Ungureanu <udan1107@gmail.com>

Author: udan11

src/Components/SetOperation.php

@@ -34,6 +34,18 @@ class SetOperation extends Component
      */
     public $value;
 
+    /**
+     * Constructor.
+     *
+     * @param string $column Field's name..
+     * @param string $value  New value.
+     */
+    public function __construct($column = null, $value = null)
+    {
+        $this->column = $column;
+        $this->value = $value;
+    }
+
     /**
      * @param Parser     $parser  the parser that serves as context
      * @param TokensList $list    the list of tokens that are being parsed