通过composer安装yii2-braintree的问题

我已经通过 Composer 成功安装了 Braintree 组件，现在我希望也使用 Composer 安装yii2-braintree https://github.com/bryglen/yii2-braintree.

我插入了，就像推荐的那样，"bryglen/yii2-braintree": "*"线在require我的部分作曲家.json:

"require": {
    "php": ">=5.4.0",
    "yiisoft/yii2": "*",
    "yiisoft/yii2-bootstrap": "*",
    "yiisoft/yii2-swiftmailer": "*",
    "braintree/braintree_php": "2.37.0",
    "bryglen/yii2-braintree": "*"
},

之后我执行了composer update结果是：

sudo composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)                                                                                                                                                                            Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - The requested package bryglen/yii2-braintree could not be found in any version, there may be a typo in the package name.

Potential causes:
 - A typo in the package name
 - The package is not available in a stable-enough version according to your minimum-stability setting
   see <https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion> for more details.

我究竟做错了什么？回购协议有问题吗？

确保您的计算机中有此设置composer.json:

"minimum-stability": "dev"

好像不见了。该扩展还没有稳定版本。

仅安装yii2-braintree, braintree_php将作为静态版本的依赖项安装 -2.30.0.