feat: support graphql subscriptions v3

[williamrijksen]

No description provided.

[kasir-barati]

When this will be rolled out?

[kasir-barati]

We already have changed the docs in NestJS: nestjs/docs.nestjs.com#3150 (comment)

Any idea?

[kasir-barati]

BTW I also realized that right now when I use this code my type won't match anymore with Apollo server's auto geenrated code. Does this PR covers this topic as well?

Code:

import { RedisPubSub } from 'graphql-redis-subscriptions';
import type { Resolvers } from '../../__generated__/resolvers-types';

const redisPubSub = new RedisPubSub();

  Subscription: {
    top: {
      subscribe(parent, args, context, info) {
        return redisPubSub.asyncIterator([
          'server-statistics-changed',
        ]);
      },
    }
  }
}

Error:

Type '(parent: {}, args: {}, context: Context, info: GraphQLResolveInfo) => AsyncIterator<unknown, any, any>' is not assignable to type 'SubscriptionSubscribeFn<any, {}, Context, {}>'.
  Type 'AsyncIterator<unknown, any, any>' is not assignable to type 'AsyncIterable<any> | Promise<AsyncIterable<any>>'.ts(2322)