Revert "Migrate phpunit configuration"

This reverts commit 29877bf.

phpunit.xml

@@ -1,19 +1,29 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" backupGlobals="false" bootstrap="vendor/autoload.php" colors="true" processIsolation="false" stopOnFailure="false" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd" cacheDirectory=".phpunit.cache" backupStaticProperties="false">
-  <coverage>
-    <report>
-      <clover outputFile="build/logs/clover.xml"/>
-    </report>
-  </coverage>
-  <logging/>
-  <testsuites>
-    <testsuite name="Package Test Suite">
-      <directory suffix="Test.php">./tests</directory>
-    </testsuite>
-  </testsuites>
-  <source>
-    <include>
-      <directory>src</directory>
-    </include>
-  </source>
+<phpunit
+		backupGlobals="false"
+		backupStaticAttributes="false"
+		bootstrap="vendor/autoload.php"
+		colors="true"
+		convertErrorsToExceptions="true"
+		convertNoticesToExceptions="true"
+		convertWarningsToExceptions="true"
+		convertDeprecationsToExceptions="true"
+		processIsolation="false"
+		stopOnFailure="false">
+
+    <filter>
+        <whitelist>
+            <directory>src</directory>
+        </whitelist>
+    </filter>
+
+    <logging>
+        <log type="coverage-clover" target="build/logs/clover.xml"/>
+    </logging>
+
+	<testsuites>
+		<testsuite name="Package Test Suite">
+			<directory suffix="Test.php">./tests</directory>
+		</testsuite>
+	</testsuites>
 </phpunit>