* fix(block): fix block decoding from ws
* feat(pubsub): add pubsub traits and sub stream
Also use DeserializeOwned alias
* feat(transports): add notification type
* feat(ws): rewrite Ws for subscription support
* feat(provider): add eth_subscribe
* fix(celo): disable some celo tests due to ganache incompatibilities
* test(rinkeby): fix flaky test
* feat(contract): WS subscription bindings (#101)
* feat(middleware): add subscriptions to middleware methods
* feat(contract): add subscribe method to contracts
* fix: relax trait bounds on JsonRpcClient
* refactor(provider): move http client to separate dir
* feat(provider): add initial Websocket support over Stream/Sink + Tungstenite
* test(provider): add websocket test
* feat(provider): add convenience method using tokio/async-std behind a feature flag
* test(provider): add websocket ssl test
* feat(provider): add TLS websockets for tokio/async-std
* docs(provider): add websocket docs / examples
* fix(provider): make tokio an optional dep
Matthias Seitz
Georgios Konstantopoulos
James Prestwich