Merge pull request #1 from ollyxar/dev

Fix testing for PHP5+

Author: alexslipknot

composer.json

@@ -23,7 +23,7 @@
     "php": ">=5.4"
   },
   "require-dev": {
-    "phpunit/phpunit": "^6.0"
+    "phpunit/phpunit": "^4.0"
   },
   "autoload": {
     "psr-4": {