* Rename NotifResponse to SubscriptionResponse to make room for new impl

* Add support for on_notification Subscription<T> types

* Fix handling of NotificationHandler in manager

* cleanup

* Implement NotificationHandler to replace Subscription<T> and clean up plumbing

* More cleanup

* impl Drop for NotificationHandler

* Address pr feedback #1

* ws client register_notification pr feedback 2

* Fix doc

* fix typo

* Add tests, get NH working

* More cleanup of String/&str

* fix doc

* Drop notification handler on send_back_sink error

* ws client notification auto unsubscribe when channel full test

* Batch requests over the websocket

* Use same call signature for both http and ws server

* Use CallError instead of InvalidParams
Add a draft batch request test

* Sort out formatting of batch responses
Cleanup
Use CallError

* Add test for slow method calls

* Update utils/src/server.rs

Co-authored-by: Niklas Adolfsson <[email protected]>

* Add benchmark for batched websocket requests

* rename

* Rename batch channels

* Sort out the InvalidParams situation

* Remove one level of InvalidParams
Return app-level error when call fails

* Update ws-server/src/server.rs

Co-authored-by: Andrew Plaza <[email protected]>

* Update ws-server/src/server.rs

Co-authored-by: Andrew Plaza <[email protected]>

Co-authored-by: Niklas Adolfsson <[email protected]>
Co-authored-by: Andrew Plaza <[email protected]>

* ret err if context/params fails

* address grumbles: specific error_code context fail

* address grumbles: make env_logger dev-dependency

* address grumbles: add tests

* chore(deps): remove unused deps

* address grumbles: rename types and docs

* address grumbles: more renaming.

* fix build

* [deps futures]: remove unused features

I got annoyed that we bring in `futures-executor` as a dependency however `soketto` does this too, so doesn't help
for the `WS` stuff.

* cargo fmt

* update http example

* ungeneric crate

* update dependencies

* [client]: add WebSocket client again.

* [deps]: remove needless dev dependencies

* nits: forgot to commit new files

* [ws client]: `send_text` instead of `send_binary`

This is temporary fix to work with the `server` which assumes that
`WebSocket` resonses are `text`

* chore: add a bunch of more logging

* [ws]: port tests but some are failing.

* chore: fmt

* [server API]: expose `fn local_addr` as public API.

* [tests]: make them less ugly by using `127.0.0.1:0`

* fix: a bunch of compiler warnings.

* [api]: uniform naming, `bind -> new` in transport.

* [websocket server]: reply when deserial fails

When the server receives an request with invalid JSON
`-32700, Parse error shall be returned`

* chore: fmt

* [tests]: fix remaining tests

* [websocket server]: support `binary` and `text`

* [ws server]: fix bug in subscription response.

`.await` was missing in ...