feat(test): added script to generate html code coverage

Author: DIOHz0r

.atoum.php

@@ -0,0 +1,12 @@
+<?php
+
+use mageekguy\atoum\reports\coverage;
+use mageekguy\atoum\writers\std;
+
+$script->addDefaultReport();
+
+$coverage = new coverage\html();
+$coverage->addWriter(new std\out());
+$coverage->setOutPutDirectory('build/tests/coverage');
+
+$runner->addReport($coverage);