windows安装yii2框架老是出现下面问题

Question

Problem 1
- yiisoft/yii2 2.0.3 requires bower-asset/jquery 2.1.@stable | 1.11.@stabl
e -> no matching package found.
- yiisoft/yii2 2.0.2 requires bower-asset/jquery 2.1.@stable | 1.11.@stabl
e -> no matching package found.
- yiisoft/yii2 2.0.1 requires bower-asset/jquery 2.1.@stable | 1.11.@stabl
e -> no matching package found.
- yiisoft/yii2 2.0.0 requires bower-asset/jquery 2.1.@stable | 1.11.@stabl
e -> no matching package found.
- Installation request for yiisoft/yii2 * -> satisfiable by yiisoft/yii2[2.0
.0, 2.0.1, 2.0.2, 2.0.3].

但是执行了：
composer global require "fxp/composer-asset-plugin:1.0.0-beta4"
这一行命令后又可以了，这条命令是作了更新操作吗？？