Changelog
1f743a0 --version flag will display version info
1ad11df First import
fb21e49 Initial commit
61d43f0 add --color flag
1b55b92 add test
7d86d1a clean help message
6ceb158 fix bug, show wrong sign with only b object key
c740bea fix not goimports-ed
2edc7c2 introduce ci
d5a4b76 print error by logger
7a74618 read external token
2dbebb3 update README.md
a0c483f use go.mod