1.3.0.3

修复了：

• dockerfile入口错误 by @wqh0109663 in #1032 #1045
• 公众号补充缺失依赖textwrap by @theLastWinner in #1046
• itchat lib兼容 python 3.7 issue #1042
• dockerfile中安装插件时提示无权限的错误 issue #1056

Full Changelog: 1.3.0.1...1.3.0.3