2.0.0-milestone1 released

[jponge]

The first milestone of Mutiny 2.0.0 has been released: https://github.com/smallrye/smallrye-mutiny/releases/tag/2.0.0-milestone1

This is not ready for production use, but you can already try it as this is the first publication of the Mutiny API based on Java Flow (java.util.concurrent.Flow) instead of Reactive Streams.

Remember that the 2 APIs are isomorphic, and that we provided adapters as part of Mutiny Zero.