Setup github actions

.github/workflows/ci.yml

@@ -0,0 +1,51 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+# This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
+# For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
+
+name: ci
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  test:
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+      matrix:
+        gemfile: ['rails_7.0', 'rails_7.1']
+        ruby: [3.3, 3.2, 3.1]
+        include:
+          - gemfile: rails_7.0
+            ruby: '3.0'
+          - gemfile: rails_7.0
+            ruby: 2.7
+          - gemfile: rails_6.1
+            ruby: 2.7
+          - gemfile: rails_6.0
+            ruby: 2.7
+          - gemfile: rails_5.2
+            ruby: 2.7
+          - gemfile: rails_5.1
+            ruby: 2.7
+          - gemfile: rails_5.0
+            ruby: 2.7
+
+    env:
+      BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
+      CI: true
+      COVERALLS_REPO_TOKEN: izk0cvqAVqD2Vdews2UjsnOZHLgzocyQL
+    steps:
+    - uses: actions/checkout@v2
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby }}
+        bundler-cache: true
+    - name: RSpec and Rubocop
+      run: |
+        bundle exec rubocop -c .rubocop.yml
+        bundle exec rspec

ph_model.gemspec

@@ -23,7 +23,7 @@ Gem::Specification.new do |gem|
   gem.add_runtime_dependency 'active_attr', '~> 0.8'
 
   gem.add_development_dependency 'faraday'
-  gem.add_development_dependency 'bundler', '~> 1.0'
+  gem.add_development_dependency 'bundler', '~> 2.3'
   gem.add_development_dependency 'rake', '~> 10.0'
   gem.add_development_dependency 'rspec', '~> 3.0'
   gem.add_development_dependency 'rubygems-tasks', '~> 0.2'