setup ci github action workflow (#5)

.github/workflows/ci.yml

@@ -0,0 +1,32 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches: main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: ['3.1', '3.2', '3.3']
+        gemfile:
+          - gemfiles/rspec_3.9.gemfile
+          - gemfiles/rspec_3.10.gemfile
+          - gemfiles/rspec_3.11.gemfile
+          - gemfiles/rspec_3.12.gemfile
+          - gemfiles/rspec_3.13.gemfile
+    steps:
+    - uses: actions/checkout@v4
+    - uses: ruby/setup-ruby@v1
+      env:
+        BUNDLE_GEMFILE: ${{ matrix.gemfile }}
+      with:
+        ruby-version: ${{ matrix.ruby }}
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - name: Run tests
+      env:
+        BUNDLE_GEMFILE: ${{ matrix.gemfile }}
+      run: bundle exec rake

.github/workflows/linter.yml

@@ -0,0 +1,16 @@
+name: Linter
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby 3.2
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: '3.2'
+        bundler-cache: true
+    - name: Run Linter
+      run: bundle exec rubocop --parallel