Don't use depicated Redis commands

Sidekiq 7.1 now warns on depircated Redis commands. `zrangebyscore` is currently used by the gem which is depicated in Redis 6.2 which is the mimimum required Redis version for current Sidekiq.

Since we most likely are supporting the latest 7.x of Sidekiq, I reused the "GTE 7.0" check and redirected calls to `zrangebyscore` to use the Sidekiq Adaptor class.

The difference in commands is based off of the changes to Sidekiq when it swapped out the depricated call:
sidekiq/sidekiq@1aca434#diff-25f829140be25a886134933b537d356dddb12234ca85319e50b381f9edb6b74dR686

lib/sidekiq-scheduler/redis_manager.rb

@@ -106,7 +106,7 @@ def self.schedule_exist?
     #
     # @return [Array] array with all the changed job names
     def self.get_schedule_changes(from, to)
-      Sidekiq.redis { |r| r.zrangebyscore(schedules_changed_key, from, "(#{to}") }
+      SidekiqScheduler::SidekiqAdapter.redis_zrangebyscore(schedules_changed_key, from, "(#{to}")
     end
 
     # Register a schedule change for a given job

lib/sidekiq-scheduler/sidekiq_adapter.rb

@@ -76,5 +76,15 @@ def self.redis_key_exists?(key_name)
         end
       end
     end
+
+    def self.redis_zrangebyscore(key, from, to)
+      Sidekiq.redis do |r|
+        if SIDEKIQ_GTE_7_0_0
+          r.zrange(key, from, to, "BYSCORE")
+        else
+          r.zrangebyscore(key, from, to)
+        end
+      end
+    end
   end
 end

spec/support/store.rb

@@ -50,7 +50,7 @@ def self.zadd(sorted_set_key, score, field_key)
     end
 
     def self.zrangebyscore(zset_key, from, to)
-      Sidekiq.redis { |r| r.zrangebyscore(zset_key, from, to) }
+      SidekiqScheduler::SidekiqAdapter.redis_zrangebyscore(zset_key, from, to)
     end
 
     def self.zrange(zset_key, from, to)