Revert "Update rack from 1.5.2 to 1.5.5"

This reverts commit 022a642.

rm useless appraisal

ref #1813, #1066

.travis.yml

@@ -11,8 +11,6 @@ matrix:
       gemfile: Gemfile
     - rvm: 2.5.3
       gemfile: gemfiles/rack_edge.gemfile
-    - rvm: 2.5.3
-      gemfile: gemfiles/rack_1.5.5.gemfile
     - rvm: 2.5.3
       gemfile: gemfiles/rails_edge.gemfile
     - rvm: 2.5.3
@@ -31,16 +29,12 @@ matrix:
       gemfile: Gemfile
     - rvm: 2.4.5
       gemfile: gemfiles/rack_edge.gemfile
-    - rvm: 2.4.5
-      gemfile: gemfiles/rack_1.5.5.gemfile
     - rvm: 2.4.5
       gemfile: gemfiles/rails_5.gemfile
     - rvm: 2.3.8
       gemfile: Gemfile
     - rvm: 2.3.8
       gemfile: gemfiles/rack_edge.gemfile
-    - rvm: 2.3.8
-      gemfile: gemfiles/rack_1.5.5.gemfile
     - rvm: 2.3.8
       gemfile: gemfiles/rails_5.gemfile
     - rvm: 2.2.10

Appraisals

@@ -11,10 +11,6 @@ appraise 'rails-5' do
   gem 'rails', '5.2.1'
 end
 
-appraise 'rack-1.5.5' do
-  gem 'rack', '1.5.5'
-end
-
 appraise 'rails-edge' do
   gem 'rails', github: 'rails/rails'
 end

spec/grape/integration/rack_spec.rb

@@ -22,7 +22,7 @@
       unless RUBY_PLATFORM == 'java'
         major, minor, patch = Rack.release.split('.').map(&:to_i)
         patch ||= 0 # rack <= 1.5.2 does not specify patch version
-        pending 'Rack 1.5.5 or 1.6.1 required' unless major >= 2 || (major >= 1 && ((minor == 5 && patch >= 5) || (minor >= 6)))
+        pending 'Rack 1.5.3 or 1.6.1 required' unless major >= 2 || (major >= 1 && ((minor == 5 && patch >= 3) || (minor >= 6)))
       end
 
       expect(JSON.parse(app.call(env)[2].body.first)['params_keys']).to match_array('test')