bump php version for phpcs

Author: nicklog

phpcs.xml

@@ -7,10 +7,10 @@
     <arg name="tab-width" value="4"/>
     <arg name="cache" value="./.phpcs.cache"/>
 
-    <config name="php_version" value="80211"/>
+    <config name="php_version" value="80311"/>
 
-    <file>src/</file>
-    <file>tests/</file>
+    <file>src</file>
+    <file>tests</file>
 
     <rule ref="./vendor/doctrine/coding-standard/lib/Doctrine/ruleset.xml">
         <exclude name="SlevomatCodingStandard.Classes.SuperfluousExceptionNaming.SuperfluousSuffix"/>