Allow skipping the type

[s-hoff]

We're trying to replace a custom commit-msg hook that used the branch names to add JIRA issues to the front of our commits with a commitizen/commitlint setup. Right now, we can't add any of the other of conventional-changelogs features yet but would like to already start using commitizen for our current convention.

Since there is already a skip option for most things, adding a skipType as well would allow us to just plug in commitizen right now.

[s-hoff]

I started working on this in #75 but its still printing undefined for the unspecified type. I can't finish this up right now but will once I get some time to do so.

[juliuscc]

I think this makes sense. I will approve it when your PR is done 😁

[github-actions]

🎉 This issue has been resolved in version 7.5.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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