update composer.json for php version & tests

Marc-Etienne Barrut · Marc-Etienne Barrut · commit d42b22a03c67 · 2018-02-16T14:08:25.000+01:00
diff --git a/composer.json b/composer.json
@@ -9,6 +9,12 @@
             "email": "haertl.mike@gmail.com"
         }
     ],
+    "require": {
+	"php": "^5.4.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^4.8"
+    },
     "autoload": {
         "psr-4": {
             "mikehaertl\\shellcommand\\": "src/"
