Added phpunit.xml.dist for out-of-the-box test runs

Author: MalteWunsch

phpunit.xml.dist

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.8/phpunit.xsd">
+    <testsuites>
+        <testsuite name="Library Test Suite">
+            <directory>Tests</directory>
+        </testsuite>
+    </testsuites>
+
+    <!-- Filter for code coverage -->
+    <filter>
+        <whitelist processUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">src/</directory>
+            <exclude>
+                <directory>vendor</directory>
+                <directory>Tests</directory>
+            </exclude>
+        </whitelist>
+    </filter>
+</phpunit>