Update from subscription-transport-ws to graphql-ws #13
Description
The subscription-transport-ws repo uses the the graphql-ws protocol to manage websocket connections to the graphql server. The subscription-transport-ws library has been deprecated and is no longer maintained so we should move away from using this.
Instead, users are encouraged to move to the graphql-ws library which uses the graphql-transport-ws protocol.
Some details on how to switch are given here: https://www.apollographql.com/docs/apollo-server/data/subscriptions/#updating-subscription-clients
This should only require changes in the src/connection/coniql.ts file.