fix: prevent comparison errors

[supercaracal]

There might be some cases that some nodes or redis-client reply with unexpected type values.

  1) Error:
RedisClient::TestCluster::PrimaryOnly#test_dedicated_commands:
ArgumentError: comparison of String with 1 failed
    /home/runner/work/redis-cluster-client/redis-cluster-client/lib/redis_client/cluster/router.rb:37:in `sort'
    /home/runner/work/redis-cluster-client/redis-cluster-client/lib/redis_client/cluster/router.rb:37:in `send_command'
    /home/runner/work/redis-cluster-client/redis-cluster-client/lib/redis_client/cluster.rb:21:in `call'
    /home/runner/work/redis-cluster-client/redis-cluster-client/test/redis_client/test_cluster.rb:174:in `block (2 levels) in test_dedicated_commands'
    /home/runner/work/redis-cluster-client/redis-cluster-client/test/redis_client/test_cluster.rb:180:in `block in test_dedicated_commands'
    /home/runner/work/redis-cluster-client/redis-cluster-client/test/redis_client/test_cluster.rb:172:in `each'
    /home/runner/work/redis-cluster-client/redis-cluster-client/test/redis_client/test_cluster.rb:172:in `test_dedicated_commands'