Set mininum PHP version to 5.5

Florian Eckerstorfer · Florian Eckerstorfer · commit 52d76db3aa03 · 2015-12-18T11:53:59.000+01:00
diff --git a/composer.json b/composer.json
@@ -5,10 +5,10 @@
     "keywords": ["process", "background", "unix"],
     "license": "MIT",
     "require": {
-        "php": ">=5.6"
+        "php": ">=5.5"
     },
     "require-dev": {
-        "phpunit/phpunit": "~5.1"
+        "phpunit/phpunit": "~4.8|~5.1"
     },
     "autoload": {
         "psr-4": {
