Add PHPUnit configuration

Author: ben221199

phpunit.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit
+	bootstrap="vendor/autoload.php"
+	cacheResult="false"
+	failOnRisky="true"
+	failOnWarning="true"
+	verbose="true">
+
+	<coverage>
+		<include>
+			<directory suffix=".php">src</directory>
+		</include>
+	</coverage>
+
+	<testsuites>
+		<testsuite name="default">
+			<directory>tests</directory>
+		</testsuite>
+	</testsuites>
+
+</phpunit>