Merge pull request overtrue#5 from overtrue/develop

Update random string generation.

Merge pull request overtrue#4 from overtrue/develop

Update random string generation.

Merge pull request overtrue#3 from overtrue/develop

WeChat user() bugfix.

Clean code.

Session status check Fixes w7corp/easywechat#246

Url fix.

WeChat API bugfix.

Request Setter.

Merge pull request overtrue#1 from xiaohome/patch-1

Update composer.json

Typo.