addressed compatability problem between sidekiq and connection_pool

Author: reemi1510

Gemfile

@@ -104,6 +104,8 @@ gem 'net-http', '>= 0.4.0'
 
 gem 'sprockets-rails', '>= 3.5.1'
 
+gem 'connection_pool', '< 3'
+
 group :development, :test do
   gem 'brakeman', require: false
   gem 'byebug', platforms: %i[mri mingw x64_mingw]

Gemfile.lock

@@ -151,7 +151,7 @@ GEM
     climate_control (0.2.0)
     coderay (1.1.3)
     concurrent-ruby (1.3.6)
-    connection_pool (3.0.2)
+    connection_pool (2.5.5)
     crack (1.0.0)
       bigdecimal
       rexml
@@ -642,6 +642,7 @@ DEPENDENCIES
   byebug
   capybara (~> 3.40, >= 3.40.0)
   climate_control
+  connection_pool (< 3)
   csv (~> 3.3, >= 3.3.4)
   database_cleaner (~> 2.0, >= 2.0.2)
   dotenv-rails (>= 3.2.0)