Add: phpunit

Openset · Openset · commit 8d3c5cf90d0d · 2018-06-28T14:05:59.000+08:00
diff --git a/composer.json b/composer.json
@@ -15,7 +15,12 @@
         }
     ],
     "minimum-stability": "stable",
-    "require": {},
+    "require": {
+        "php": ">=5.6"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^6.0"
+    },
     "autoload": {
         "psr-4": {
             "Openset\\": "src/"
