Updated phpunit configuration

phpunit.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <phpunit
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.0/phpunit.xsd"
+        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.4/phpunit.xsd"
         backupGlobals="true"
         colors="false"
         processIsolation="false"
@@ -16,17 +16,18 @@
         cacheDirectory=".phpunit.cache"
         backupStaticProperties="false"
         requireCoverageMetadata="false">
-    <testsuites>
-        <testsuite name="Functional tests">
-            <directory>tests/functional/</directory>
-        </testsuite>
-    </testsuites>
-    <coverage>
-        <include>
-            <directory suffix=".php">src</directory>
-        </include>
-    </coverage>
-    <php>
-        <ini name="allow_url_include" value="1" />
-    </php>
+  <testsuites>
+    <testsuite name="Functional tests">
+      <directory>tests/functional/</directory>
+    </testsuite>
+  </testsuites>
+  <coverage/>
+  <php>
+    <ini name="allow_url_include" value="1"/>
+  </php>
+  <source>
+    <include>
+      <directory suffix=".php">src</directory>
+    </include>
+  </source>
 </phpunit>