Upgrade phpunit.xml.dist

Author: sandrokeil

phpunit.xml.dist

@@ -1,23 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit
-        colors="true"
-        cacheResult="true"
-        stopOnFailure="false"
-        convertErrorsToExceptions="true"
-        convertNoticesToExceptions="true"
-        convertWarningsToExceptions="true"
-        backupGlobals="false"
-        backupStaticAttributes="false"
-        failOnRisky="true"
-        failOnWarning="true"
->
-    <testsuite name="Open Code Modeling Code AST - Test Suite">
-        <directory suffix=".php">./tests</directory>
-    </testsuite>
-
-    <filter>
-        <whitelist>
-            <directory>./src/</directory>
-        </whitelist>
-    </filter>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" colors="true" cacheResult="true" stopOnFailure="false"
+         convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true"
+         backupGlobals="false" backupStaticAttributes="false" failOnRisky="true" failOnWarning="true"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage>
+    <include>
+      <directory>./src/</directory>
+    </include>
+  </coverage>
+  <testsuite name="Open Code Modeling Code AST - Test Suite">
+    <directory suffix=".php">./tests</directory>
+  </testsuite>
 </phpunit>