What's Changed
* 81 not importing ioutils from init by pengyunie in https://github.com/pengyunie/seutil/pull/82
* [io] fixes 78, correct file_exist+append checks in io.dump by pengyunie in https://github.com/pengyunie/seutil/pull/80
* [build] prepare for 0.8.9 release by pengyunie in https://github.com/pengyunie/seutil/pull/83
**Full Changelog**: https://github.com/pengyunie/seutil/compare/0.8.8...0.8.9