Update rack to 2.2.20 (#966)

Author: levan-m

Gemfile

@@ -3,6 +3,7 @@ source 'https://rubygems.org'
 chef_version = ENV.fetch('CHEF_VERSION', '14.10.9')
 
 gem 'rake'
+gem 'rack', '>= 2.2.20'
 gem 'rspec-expectations', '< 3.12.4'
 gem 'chef', "= #{chef_version}"
 gem 'cucumber-core', '~> 3.2.1'

Gemfile.lock

@@ -221,7 +221,7 @@ GEM
     proxifier (1.0.3)
     public_suffix (4.0.6)
     racc (1.8.1)
-    rack (2.2.18)
+    rack (2.2.21)
     rainbow (3.1.1)
     rake (13.2.1)
     rbnacl (4.0.2)
@@ -379,6 +379,7 @@ DEPENDENCIES
   json_spec (~> 1.1.4)
   kitchen-docker (~> 2.3.0)
   kitchen-vagrant
+  rack (>= 2.2.20)
   rake
   rbnacl (~> 4.0.2)
   rbnacl-libsodium (~> 1.0.16)
@@ -389,4 +390,4 @@ DEPENDENCIES
   yaml
 
 BUNDLED WITH
-   2.3.26
+   2.3.27