Merge pull request #19757 from jrafanie/upgrade_config_for_ruby27_sup…

…port

Upgrade to config gem 2.2.1 for ruby 2.7 support

Gemfile

@@ -34,7 +34,7 @@ gem "bcrypt",                         "~> 3.1.10",     :require => false
 gem "bundler",                        ">=1.15",        :require => false
 gem "byebug",                                          :require => false
 gem "color",                          "~>1.8"
-gem "config",                         "~>2.0",         :require => false
+gem "config",                         "~>2.2", ">=2.2.1", :require => false
 gem "dalli",                          "=2.7.6",        :require => false
 gem "default_value_for",              "~>3.3"
 gem "docker-api",                     "~>1.33.6",      :require => false