- Switched to 0.2 version of [`actix-ws` crate]. ([#1197])
- Renamed `subscriptions::subscriptions_handler()` as `subscriptions::graphql_ws_handler()` for processing the [legacy `graphql-ws` GraphQL over WebSocket Protocol][graphql-ws]. ([#1191], [#1197])
-`subscriptions::graphql_transport_ws_handler()` allowing to process the [new `graphql-transport-ws` GraphQL over WebSocket Protocol][graphql-transport-ws]. ([#1191], [#1197])
-`subscriptions::ws_handler()` with auto-selection between the [legacy `graphql-ws` GraphQL over WebSocket Protocol][graphql-ws] and the [new `graphql-transport-ws` GraphQL over WebSocket Protocol][graphql-transport-ws], based on the `Sec-Websocket-Protocol` HTTP header value. ([#1191], [#1197])