Updated composer.json and composer.lock

Author: creocoder

composer.json

@@ -16,6 +16,10 @@
     "require": {
         "yiisoft/yii2": "~2.0.0"
     },
+    "require-dev": {
+        "phpunit/phpunit": "~4.0",
+        "phpunit/dbunit": "~1.0"
+    },
     "autoload": {
         "psr-4": {
             "creocoder\\nestedsets\\": "src"