Move rack and rackup into dev/test block

.github/workflows/tests.yml

@@ -24,7 +24,7 @@ jobs:
       fail-fast: false
       matrix:
         ruby_version: ["3.0", "3.1", "3.2", "3.3"]
-        rack_version: ["2.2", "3.1"]
+        rack_version: ["2.2.5", "3.1"]
     runs-on: ubuntu-latest
     services:
       postgres:

Gemfile

@@ -17,6 +17,14 @@ group :development, :test do
   gem 'rubocop-rspec', '~> 3.0.2'
   gem 'rubocop-sequel', '~> 0.3.4'
   gem 'sequel', require: nil
+
+  rack_version = ENV.fetch('RACK_VERSION', "3.1")
+  gem "rack", rack_version
+  if Gem::Version.new(rack_version) < Gem::Version.new('3.0.0')
+    gem "rackup", "~> 1.0"
+  else
+    gem "rackup", "~> 2.0"
+  end
 end
 
 group :test do
@@ -25,14 +33,6 @@ group :test do
   gem 'rspec', '~> 3.9'
 end
 
-rack_version = ENV['RACK_VERSION'] || "3.0"
-gem "rack", rack_version
-if Gem::Version.new(rack_version) < Gem::Version.new('3.0.0')
-  gem "rackup", "~> 1.0"
-else
-  gem "rackup", "~> 2.0"
-end
-
 gem 'prometheus-client', '~> 1.0'
 source "https://rubygems.pkg.github.com/gocardless" do
   gem "prometheus_gcstat"