Update to Prometheus 1.x.x about sttp

[andreazube]

Unfortunately, there are some serious breaking changes in the 1.x line.

For example, as far as I can tell it's no longer possible to provide custom buckets for histograms, a functionality that was previously there and sttp exposed to the user. So, if I'm understanding it correctly, updating prometheus will also imply a breaking change in sttp. Not sure how far away sttp4 is from being released, but it could be it'll be the only version with the new prometheus client.

I quickly tried to update the dependency myself in a fork, but gave up because of the above - the upgrade isn't big per se, but requires some choices that will impact sttp's API.

---

In the meantime, what you can do in your own project is add the simpleclient bridge.

This at least makes sttp and tapir work together nicely again, but it's of course a temporary solution until sttp is able to use prometheus-client 1.x

[adamw]

Maybe we can update to 1.x.x in sttp4, and keep the old version in sttp3, wdyt?

[Awethon]

I might be wrong but classicUpperBounds method in histogram builder is suitable to make custom buckets.
I hope sttp4 will be released soon, didn't expect tapir and sttp dependencies to diverge.