Migrate PHPUnit configuration (#17)

phpunit.xml

@@ -1,15 +1,22 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/5.4/phpunit.xsd"
-         bootstrap="bootstrap.php"
-         backupGlobals="false"
-         beStrictAboutCoversAnnotation="true"
-         beStrictAboutOutputDuringTests="true"
-         beStrictAboutTestsThatDoNotTestAnything="true"
-         beStrictAboutTodoAnnotatedTests="true"
-         verbose="true"
-         colors="true"
+<phpunit
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.5/phpunit.xsd"
+    bootstrap="bootstrap.php"
+    backupGlobals="false"
+    beStrictAboutCoversAnnotation="true"
+    beStrictAboutOutputDuringTests="true"
+    beStrictAboutTestsThatDoNotTestAnything="true"
+    beStrictAboutTodoAnnotatedTests="true"
+    verbose="true"
+    colors="true"
 >
+    <coverage processUncoveredFiles="true">
+        <include>
+            <directory suffix=".php">src</directory>
+        </include>
+    </coverage>
+
     <testsuites>
         <testsuite name="EndToEnd">
             <directory suffix="Test.php">tests/EndToEnd</directory>
@@ -22,13 +29,7 @@
         </testsuite>
     </testsuites>
 
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
-            <directory suffix=".php">src</directory>
-        </whitelist>
-    </filter>
-
     <listeners>
-        <listener class="Symfony\Bridge\PhpUnit\SymfonyTestsListener" />
+        <listener class="Symfony\Bridge\PhpUnit\SymfonyTestsListener"/>
     </listeners>
 </phpunit>