Add bootstrap and set error reporting to E_STRICT

phpunit.xml.dist

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit
-        bootstrap="vendor/autoload.php"
+        bootstrap="test/bootstrap.php"
         checkForUnintentionallyCoveredCode="true"
         colors="true"
         convertErrorsToExceptions="true"

test/bootstrap.php

@@ -0,0 +1,5 @@
+<?php
+
+error_reporting(E_STRICT);
+
+require_once __DIR__ . "/../vendor/autoload.php";