Update phpunit.xml.dist to PHPUnit 11.5 schema and remove deprecated attributes

Author: freekmurze

phpunit.xml.dist

@@ -1,14 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.5/phpunit.xsd"
     bootstrap="vendor/autoload.php"
-    backupGlobals="false"
     colors="true"
-    processIsolation="false"
-    stopOnFailure="false"
     cacheDirectory=".phpunit.cache"
-    backupStaticProperties="false"
 >
   <coverage>
     <report>