feat(rest-datasource): support redis cluster and sentinel

CHANGELOG.md

@@ -7,6 +7,7 @@
 - core: Expose SHA-256 hex hash digest of the Engine API key to plugins, when available, as `engine.apiKeyHash`. [PR# 2685](https://github.com/apollographql/apollo-server/pull/2685)
 - `apollo-datasource-rest`: If another `Content-type` is already set on the response, don't overwrite it with `application/json`, allowing the user's initial `Content-type` to prevail. [PR #2520](https://github.com/apollographql/apollo-server/issues/2035)
 - `apollo-cache-control`: Do not respond with `Cache-control` headers if the HTTP response contains `errors`. [PR #2715](https://github.com/apollographql/apollo-server/pull/2715)
+- `apollo-server-cache-redis`: **BREAKING FOR USERS OF `apollo-server-cache-redis`** (This is a package that must be updated separately but shares the same `CHANGELOG.md` with Apollo Server itself.)  A new **major** version of this package has been published and updated to support Redis Standalone, Cluster and Sentinel modes.  This is a breaking change since it is now based on [`ioredis`](https://github.com/luin/ioredis) instead of [`node_redis`](https://github.com/NodeRedis/node_redis).  Although this update is compatible with the most common uses of `apollo-server-cache-redis`, please check the [options supported by `ioredis`](https://github.com/luin/ioredis/blob/master/API.md#new-redisport-host-options) while updating to this version.  The constructor options are passed directly from `RedisCache` to the new Redis adapter.  The pre-1.0 versions should continue to work with Apollo Server without modification. [PR #1770](https://github.com/apollographql/apollo-server/pull/1770)
 
 ### v2.5.0
 

docs/source/features/data-sources.md

@@ -264,7 +264,7 @@ const server = new ApolloServer({
 });
 ```
 
-For documentation of the options you can pass to the underlying Redis client, look [here](https://github.com/NodeRedis/node_redis).
+For documentation of the options you can pass to the underlying Redis client, look [here](https://github.com/luin/ioredis).
 
 ## Implementing your own cache backend