feat: Upgrade Redis 3 to 4 (#8293)

BREAKING CHANGE: This release upgrades to Redis 4; if you are using the Redis cache adapter with Parse Server then this is a breaking change as the Redis client options have changed; see the [Redis migration guide](https://github.com/redis/node-redis/blob/redis%404.0.0/docs/v3-to-v4.md) for more details (#8293)

src/Adapters/PubSub/RedisPubSub.js

@@ -1,13 +1,13 @@
-import redis from 'redis';
+import { createClient } from 'redis';
 
 function createPublisher({ redisURL, redisOptions = {} }): any {
   redisOptions.no_ready_check = true;
-  return redis.createClient(redisURL, redisOptions);
+  return createClient(redisURL, redisOptions);
 }
 
 function createSubscriber({ redisURL, redisOptions = {} }): any {
   redisOptions.no_ready_check = true;
-  return redis.createClient(redisURL, redisOptions);
+  return createClient(redisURL, redisOptions);
 }
 
 const RedisPubSub = {