Fixed phpcs.xml

Author: SoftCreatR

phpcs.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <ruleset>
-    <file>files/</file>
-    <exclude-pattern>lib/system/api/*</exclude-pattern>
+    <file>src</file>
+    <file>tests</file>
     <arg name="extensions" value="php" />
     <arg value="p"/>
     <arg name="basepath" value="."/>