Fix incorrect PHPUnit config

Author: Potherca

.config/phpunit.xml.dist

@@ -20,9 +20,9 @@
         </testsuite>
     </testsuites>
 
-    <coverage processUncoveredFiles="false">
+    <coverage cacheDirectory="../.phpunit.cache/code-coverage" processUncoveredFiles="false">
         <include>
-            <directory suffix=".php">src/</directory>
+            <directory suffix=".php">../src/</directory>
         </include>
         <report>
             <!-- clover outputFile="build/clover.xml"/ -->