If polling encounters a `Poll::Pending` we need to return it instead of
continuing the loop which may turn it into a blocking operation, causing
problems with executors.
* Open one substream for each notifications protocol
* Fix WASM build
* Apply suggestions from code review
Co-Authored-By: Toralf Wittner <tw@dtex.org>
* Address concerns
* Use unsigned-varint to read the varint
* Use unsigned-varint
* Forgot Cargo.lock
Co-authored-by: Toralf Wittner <tw@dtex.org>
Pierre Krieger