Commit ebaa25d9e2fd5582b7fe0e3ec482c1627996e4d7 introduced a couple of
breaking changes to the schema and proto files. The bump ensures
backwards compat for users that have indicated `~0.4` as their version
constraint.
Changelog-Changed: rust: New version of `cln-rpc==0.5` and `cln-grpc==0.5`
Changelog-Added: clnrest can now return successful responses as xml, yaml, or form-encoded in addition to json defined in the 'Accept' header. The same goes for request types defined in the 'Content-type' header.
