laravel5.3 安装 "overtrue/wechat:~3.1 失败

[yanggg1133]

我用的环境

PHP 版本：7
overtrue/wechat 版本：2.1

问题及现象

composer require "overtrue/wechat:~3.1" -vvv

Installation failed, reverting ./composer.json to its original content.

[yanggg1133]

Your requirements could not be resolved to an installable set of packages.

Problem 1
- overtrue/laravel-wechat 2.1.2 requires overtrue/wechat 2.1.* -> satisfiabl
e by overtrue/wechat[2.1.0, 2.1.38, 2.1.39, 2.1.41, 2.1.x-dev] but these conflic
t with your requirements or minimum-stability.
- overtrue/laravel-wechat 2.1.2 requires overtrue/wechat 2.1.* -> satisfiabl
e by overtrue/wechat[2.1.0, 2.1.38, 2.1.39, 2.1.41, 2.1.x-dev] but these conflic
t with your requirements or minimum-stability.
- overtrue/laravel-wechat 2.1.2 requires overtrue/wechat 2.1.* -> satisfiabl
e by overtrue/wechat[2.1.0, 2.1.38, 2.1.39, 2.1.41, 2.1.x-dev] but these conflic
t with your requirements or minimum-stability.
- Installation request for overtrue/laravel-wechat (locked at 2.1.2, require
d as 2.1.*) -> satisfiable by overtrue/laravel-wechat[2.1.2].

Installation failed, reverting ./composer.json to its original content.

[overtrue]

composer require overtrue/laravel-wechat:~3.1