Sshc

What's Changed
* Issue 3 by fahadahammed in https://github.com/fahadahammed/sshc/pull/16
* added UPDATE command with README: v1 by fahadahammed in https://github.com/fahadahammed/sshc/pull/17

Minor: format when get the list via read command without verbose.

**Full Changelog**: https://github.com/fahadahammed/sshc/compare/1.0.0...2.0.0

When inserting data, groups are not "required" as the default value is an empty list. But still giving error 4