The `cln-grpc` crate really has a dual purpose: server and
client. Having the server feature be included by default means that we
are pulling in `cln-rpc` which is a Unix only crate, because of the
use of UDS to talk to CLN. We want to use `cln-grpc` on clients too,
and those might not be Unix variants, hence they'd fail when compiling
`cln-rpc`. This PR guards the Unix-related parts behind the `server`
feature flag.
This commit updates outdated dependencies and hangs all
bitcoin-related dependencies off of the `bitcoin` crate, using its
re-exports. This means that as long as the bitcoin crate matches, all
of its dependents will also match.
Changelog-None
