This still depends on unreleased diesel and diesel-async code. As soon
as new diesel and diesel-async code has been released, we can remove
the [patch.crates-io] from Cargo.toml.
This crate can be used to build external ChirpStack integrations.
The plan is to move all non-HTTP based integrations to external
repositories. The reason is that these integrations usually require
quite some external dependencies as these rely on their own SDKs.