add integer format

src/formats/IntegerFormat.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Itguild\Tables\formats;
+
+use Itguild\Tables\formats\BaseFormat;
+
+class IntegerFormat extends BaseFormat
+{
+
+    static function fetch(?string $data, string $options = "")
+    {
+        return intval($data);
+    }
+}