updated composer.json to be less restrictive

also removed superflous minimum-stability definition

composer.json

@@ -11,7 +11,12 @@
 		"irc": "irc://irc.freenode.net/yii",
 		"source": "https://github.com/yiisoft/yii2"
 	},
-	"minimum-stability": "dev",
+	"authors": [
+		{
+			"name": "Qiang Xue",
+			"email": "qiang.xue@gmail.com"
+		}
+	],
 	"require": {
 		"yiisoft/yii2": "*",
 		"twbs/bootstrap": "3.0.*"