Partially revert 5e836e6

sebastianbergmann · sebastianbergmann · commit 13edfd870646 · 2015-12-08T08:14:41.000+01:00
diff --git a/composer.json b/composer.json
@@ -18,7 +18,7 @@
         "php": ">=5.3.3"
     },
     "require-dev": {
-        "phpunit/phpunit": "~5"
+        "phpunit/phpunit": "~4.8"
     },
     "autoload": {
         "classmap": [
