Only notify about dependencies that bumped to next major version

I am getting notifications about bumping to `base-4.20` when the package says `base < 4.13` meaning it clearly is abandoned.

I'd like to get notifications only when my package has been up-to-date before. So, e.g. when it says `base < 4.20` and then `base` is released with `4.20` or `5.x` or maybe even `4.21` in case `4.20` is deprecated or does not exist.