fix: support rack 2 and 3

Author: YOU54F

.github/workflows/test.yml

@@ -4,16 +4,19 @@ on: [push, pull_request]
 
 jobs:
   test:
-    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         ruby_version: ["2.7", "3.0", "3.1", "3.2", "3.3"]
         os: ["ubuntu-latest","windows-latest","macos-latest"]
+        rack_version: ["2", "3"]
+    runs-on: ${{ matrix.os }}
+    env:
+      RACK_VERSION: ${{ matrix.rack_version }}
     steps:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby_version }}
       - run: "bundle install"
-      - run: "bundle exec rake"
+      - run: "bundle exec rake"

pact-provider-verifier.gemspec

@@ -26,7 +26,9 @@ Gem::Specification.new do |gem|
   gem.add_runtime_dependency 'faraday', '~> 2.5'
   gem.add_runtime_dependency 'faraday-retry', '~> 2.2'
   gem.add_runtime_dependency 'json',  '>1.8'
-  gem.add_runtime_dependency 'rack', '~> 2.1'
+  gem.add_runtime_dependency 'rack', '>= 3.0', '< 4.0'
+  gem.add_runtime_dependency 'rackup', '~> 2.0'
+
   gem.add_runtime_dependency 'rack-reverse-proxy'
   gem.add_runtime_dependency 'rspec_junit_formatter', '~> 0.3'
   gem.add_runtime_dependency 'ostruct'