Merge pull request #37 from SjorsO/patch-1

Support phpunit ^7.0

Author: brendt

composer.json

@@ -21,7 +21,7 @@
     ],
     "require": {
         "php": "^7.0",
-        "phpunit/phpunit": "^5.7|^6.0"
+        "phpunit/phpunit": "^5.7|^6.0|^7.0"
     },
     "autoload": {
         "psr-4": {