integrate directly with the same tool semantic release uses

[thatkookooguy]

if the branch is not passed through an environment variable or the command line parameters,
use env-ci to get the branch from knowns CIs.

Reference

if no branch was passed, and isCi and branch exists, use that.

as a CLI tool

1. console.log to notify the user like semantic-release does
2. select the branch automatically

as a library

1. add a function to get the branch internally (through env-ci) so the users can composition the functions to get the same result