use latest version of phpunit/phpunit based on PHP version

mikaelcom · mikaelcom · commit 74fcc1a2adeb · 2017-09-12T11:50:18.000+02:00
diff --git a/composer.json b/composer.json
@@ -25,7 +25,7 @@
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "~2.0",
-        "phpunit/phpunit": "~4.0"
+        "phpunit/phpunit": "^4.8 || ^6.0"
     },
     "autoload": {
         "psr-4": {
