bump yii version for security fix

composer.json

@@ -15,7 +15,7 @@
     "minimum-stability": "dev",
     "require": {
         "php": ">=5.4.0",
-        "yiisoft/yii2": ">=2.0.4",
+        "yiisoft/yii2": ">=2.0.5",
         "yiisoft/yii2-bootstrap": "*",
         "yiisoft/yii2-swiftmailer": "*"
     },