bootstrap was missing

Author: Luca Degasperi

phpunit.xml.dist

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit colors="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" stopOnError="false" stopOnFailure="false" stopOnIncomplete="false" stopOnSkipped="false">
+<phpunit colors="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" stopOnError="false" stopOnFailure="false" stopOnIncomplete="false" stopOnSkipped="false" bootstrap="vendor/autoload.php">
     <testsuites>
         <testsuite name="Package Test Suite">
             <directory suffix=".php">./tests/</directory>