For 5.8

5.8 兼容问题。 (overtrue#301)

* laravel 5.4 起弃用 Event 的 fire 方法。5.8 起正式移除该方法。

* laravel 5.8 起弃用 str_* 和 arr_* 助手方法，5.9 起移除。

Merge pull request overtrue#247 from lazyou/patch-1

fix: 解决当 php 安装 event 扩展时带来的问题.

Merge branch 'master' of github.com:overtrue/laravel-wechat

Merge pull request overtrue#225 from mingyoung/patch-2

Remove type hint.

fix wework config.

Merge pull request overtrue#217 from jaychan/patch-1

Fixed config bug

Apply fixes from StyleCI (overtrue#211)

Bugfix.

Update.