PHPUnit 9 changed configuration schema slightly

test/php/phpunit.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit backupGlobals="false"
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  backupGlobals="false"
   backupStaticAttributes="false"
   colors="true"
   convertErrorsToExceptions="true"
@@ -9,7 +10,12 @@
   stopOnFailure="false"
   bootstrap="./bootstrap.php"
   beStrictAboutTestsThatDoNotTestAnything="true"
-    >
+  xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage>
+    <include>
+      <directory>../../lib-php/</directory>
+    </include>
+  </coverage>
   <php>
     </php>
   <testsuites>
@@ -17,10 +23,4 @@
       <directory>./Nominatim</directory>
     </testsuite>
   </testsuites>
-    <filter>
-        <whitelist>
-            <directory>../../lib-php/</directory>
-        </whitelist>
-    </filter>
-
 </phpunit>