Update .phpcs.xml

.phpcs.xml

@@ -22,8 +22,8 @@
    <file>.</file>
    <exclude-pattern>vendor</exclude-pattern>
 
-   <!-- Check for cross-version support for PHP 5.6 and higher. -->
-   <config name="testVersion" value="5.4-"/>
+   <!-- Check for cross-version support for PHP 7.1 and higher. -->
+   <config name="testVersion" value="7.0-"/>
 
    <!-- args -->
    <arg name="extensions" value="php,php5,inc"/>