message: Publicly export Handler
diff: @@ -247,7 +247,7 @@ use regex::Regex;
  pub use jetstream::JetStreamOptions;
  pub use message::Message;
  pub use options::Options;
  -pub use subscription::Subscription;
  +pub use subscription::{Handler, Subscription};
  /// A re-export of the `rustls` crate used in this crate,
  /// for use in cases where manual client configurations
  