Add the ability to ignore lockfile updates when using increase-if-necessary

[mansona]

Is there an existing issue for this?

• I have searched the existing issues

Feature description

I'm currently using increase-if-necessary as my versioning strategy (along side grouping certain updates) and it's doing almost what I would like it to do. My idea is that I only want to see version update PRs if those updates would require me to change a range in my package.json.

The current behaviour however is that I get a PR created to just update the lockfile when using the increase-if-necessary strategy and this is far too noisy for what I want 😞 I only want to see a PR for dependencies that will actually change my package.json and I would love to have some sort of ignore-lockfile option, or more-specifically ignore-lockfile-only i.e. when it would only update the lockfile it would not open a PR