v1.0.7

fix help double display

v1.0.6

fix the case when flags have no val and next is cmd

v1.0.5

fix the `--` flag parsing

v1.0.4

add flag parsing support

v1.0.3

fix help display

v1.0.2

shorten the usage string

v1.0.1

update dox

v1.0.0

update the dox