v0.5.8

Full Changelog: v0.5.7...v0.5.8

v0.5.7

update argparse

v0.5.6

update version

v0.5.5

1. update argparse
2. update readme

v0.5.4

1. update argparse
2. argument with group

v0.5.3

update release.sh
update argparse

v0.5.2

update argparse

v0.5.1

add shell complete support

v0.5.0

1. pull gomail to local package
2. fix attachment file name issue
3. update argparse version

v0.4.2

update argparse