Change PHPUnit noNamespaceSchemaLocation to vendor location.

Author: Potherca

phpunit.xml.dist

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.8/phpunit.xsd"
+    xsi:noNamespaceSchemaLocation="./vendor/phpunit/phpunit/phpunit.xsd"
 
     backupGlobals="false"
     strict="true"