Exceptionx

1. Optimize the code segment for exception retry.
2. Optimize support for retrying asynchronous functions.
3. Fix an error in the process of silent exception handling.
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1. 优化异常重试的代码段。
2. 优化针对重试异步函数的支持。
3. 修复异常静默处理过程中的一个错误。

What's Changed
* 3.0.1 by 2018-11-27 in https://github.com/gqylpy/exceptionx/pull/19


**Full Changelog**: https://github.com/gqylpy/exceptionx/compare/3.0...3.0.1

1. Improve the `logger` parameter to support custom loggers.
2. Optimize multiple type annotations.
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1. 改进 `logger` 参数以支持自定义日志记录器。
2. 优化多处类型注解。

This version is compatible with Python 3.7.