[refactor/tests] Added tests for Redis PubSub replication

[rennokki]

This PR adds some changes to the PubSub replication PR (#140) introduced by @francislavoie

Currently, the tests are set up to run for both Local and Redis clients in the same CI pipeline.

[francislavoie]

FWIW I called it "replication" because it's not purely pubsub due to having the channel methods in the interface. But no complaints from me, either is okay.

[rennokki]

Then I'll just revert the namings. I want something really concise. 🤔 replicator ?

[rennokki]

Just found out that tests can be done by using mocking.

https://github.com/clue/reactphp-redis/blob/master/tests/FactoryLazyClientTest.php

[codecov-commenter]

Codecov Report

Merging #453 into refactor/tests will increase coverage by 9.40%.
The diff coverage is 89.74%.

@@                 Coverage Diff                  @@
##             refactor/tests     #453      +/-   ##
====================================================
+ Coverage             60.79%   70.19%   +9.40%     
====================================================
  Files                    53       53              
  Lines                  1311     1171     -140     
====================================================
+ Hits                    797      822      +25     
+ Misses                  514      349     -165     

Impacted Files	Coverage Δ	Complexity Δ
src/PubSub/Drivers/RedisClient.php	58.62% <68.75%> (+58.62%)	0.00 <0.00> (-22.00)	⬆️
src/Dashboard/DashboardLogger.php	89.36% <86.95%> (+0.72%)	0.00 <0.00> (-8.00)	⬆️
src/Console/StartWebSocketServer.php	80.19% <100.00%> (+2.17%)	0.00 <0.00> (-19.00)	⬆️
...rc/HttpApi/Controllers/FetchChannelsController.php	100.00% <100.00%> (ø)	0.00 <0.00> (-8.00)
src/PubSub/Drivers/LocalClient.php	96.29% <100.00%> (-0.26%)	0.00 <0.00> (-11.00)
src/WebSockets/Channels/Channel.php	96.07% <100.00%> (-0.54%)	0.00 <0.00> (-22.00)
src/WebSockets/Channels/PresenceChannel.php	100.00% <100.00%> (ø)	0.00 <0.00> (-9.00)
src/WebSocketsServiceProvider.php	96.42% <100.00%> (+21.80%)	0.00 <0.00> (-8.00)	⬆️
src/Console/RestartWebSocketServer.php	75.00% <0.00%> (-25.00%)	0.00% <0.00%> (-1.00%)
src/Statistics/DnsResolver.php	33.33% <0.00%> (-6.67%)	0.00% <0.00%> (-5.00%)
... and 35 more

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