feature: support for redis >= v4

Gemfile

@@ -6,4 +6,3 @@ source 'https://rubygems.org'
 gemspec
 
 gem 'pg', '< 1.0.0'
-gem 'redis', '< 4.0.0'

lib/treasury/bg_executor/client.rb

@@ -1,4 +1,3 @@
-# coding: utf-8
 require 'digest/sha2'
 
 module Treasury
@@ -28,7 +27,11 @@ def redis
       end
 
       def reconnect!
-        redis.redis.client.reconnect
+        if Gem::Version.new(::Redis::VERSION) < Gem::Version.new('4')
+          redis.redis.client.reconnect
+        else
+          redis.redis._client.reconnect
+        end
       end
 
       # поставить задачу в очередь

lib/treasury/storage/redis/base.rb

@@ -117,7 +117,13 @@ def internal_write(object, data)
         end
 
         def self.new_redis_session
-          ::Redis.new(Treasury.configuration.redis.client.options)
+          client = if Gem::Version.new(::Redis::VERSION) < Gem::Version.new('4')
+                     Treasury.configuration.redis.client
+                   else
+                     Treasury.configuration.redis._client
+                   end
+
+          ::Redis.new(client.options)
         end
 
         module Batch