added phpcompatibilitywp

Author: Mte90

codeat.xml

@@ -88,6 +88,7 @@
 		<exclude name="PHPCompatibility.PHP.EmptyNonVariable.Found" />
 		<exclude name="PHPCompatibility.PHP.NewClosure.Found" />
 	</rule>
+	<rule ref="PHPCompatibilityWP" />
 	<!-- Check for cross-version support for PHP 5.6 and higher. -->
 	<config name="testVersion" value="5.6"/>
 	<rule ref="WordPress">