Add support for sharded PubSub (#2373)

* refactor pubsub, add support for sharded pub sub

* run tests in redis 7 only, fix PUBSUB SHARDCHANNELS test

* add some comments and fix some bugs

* PubSubType, not PubSubTypes 🤦‍♂️

* remove test.txt

* fix some bugs, add tests

* add some tests

* fix #2345 - allow PING in PubSub mode (remove client side validation)

* remove .only

* revert changes in cluster/index.ts

* fix tests minimum version

* handle server sunsubscribe

* add 'sharded-channel-moved' event to docs, improve the events section in the main README (fix #2302)

* exit "resubscribe" if pubsub not active

* Update commands-queue.ts

* Release client@1.5.0-rc.0

* WIP

* use `node:util` instead of `node:util/types` (to support node 14)

* run PubSub resharding test with Redis 7+

* fix inconsistency in live resharding test

* add some tests

* fix iterateAllNodes when starting from a replica

* fix iterateAllNodes random

* fix slotNodesIterator

* fix slotNodesIterator

* clear pubSubNode when node in use

* wait for all nodes cluster state to be ok before testing

* `cluster.minimizeConections` tests

* `client.reconnectStrategry = false | 0` tests

* sharded pubsub + cluster 🎉

* add minimum version to sharded pubsub tests

* add cluster sharded pubsub live reshard test, use stable dockers for tests, make sure to close pubsub clients when a node disconnects from the cluster

* fix "ssubscribe & sunsubscribe" test

* lock search docker to 2.4.9

* change numberOfMasters default to 2

* use edge for bloom

* add tests

* add back getMasters and getSlotMaster as deprecated functions

* add some tests

* fix reconnect strategy + docs

* sharded pubsub docs

* Update pub-sub.md

* some jsdoc, docs, cluster topology test

* clean pub-sub docs

Co-authored-by: Simon Prickett <simon@redislabs.com>

* reconnect startegy docs and bug fix

Co-authored-by: Simon Prickett <simon@redislabs.com>

* refine jsdoc and some docs

Co-authored-by: Simon Prickett <simon@redislabs.com>

* I'm stupid

* fix cluster topology test

* fix cluster topology test

* Update README.md

* Update clustering.md

* Update pub-sub.md

Co-authored-by: Simon Prickett <simon@redislabs.com>

packages/client/lib/commands/SPUBLISH.spec.ts

@@ -0,0 +1,21 @@
+import { strict as assert } from 'assert';
+import testUtils, { GLOBAL } from '../test-utils';
+import { transformArguments } from './SPUBLISH';
+
+describe('SPUBLISH', () => {
+    testUtils.isVersionGreaterThanHook([7]);
+    
+    it('transformArguments', () => {
+        assert.deepEqual(
+            transformArguments('channel', 'message'),
+            ['SPUBLISH', 'channel', 'message']
+        );
+    });
+
+    testUtils.testWithClient('client.sPublish', async client => {
+        assert.equal(
+            await client.sPublish('channel', 'message'),
+            0
+        );
+    }, GLOBAL.SERVERS.OPEN);
+});