Support for -n or --no-verify option

[ethyde]

Hello,

I started using this module as a remplacement for npm/standard version, but in my workflow we use commitlint to ensure well formated commit message.

And when i prepare a release, and because i don't need to lint my commit message, i can use --no-verif to bypass linting.

At this moment i have found a workaround with git-branch-is to check the branch name, but i think it would be cool to add this option.

Thanks !

[JamesMessinger]

Fixed by PR #31