per repo Configurable support for alwaysLatest version update selection strategy

[caoilte]

Scala Steward has a really neat semantic versioning targeted update selection strategy as well described in the How does Scala Steward decide what version it is updating to? section of the FAQ.

It doesn't work so well for one of our internal libraries which are versioned as YYYY.MM.DD.V (ie year/month/day/patch) and which frequently have multiple release at V per day. You would need to merge and re-run scala-steward at least twice every time to get to the latest version.

It would be helpful if we could configure scala steward to always try and update some libraries to the latest version.

[kubukoz]

FWIW the AWS SDK also follows this versioning pattern, which should be a more common usecase for having this kind of config.