Modernize CI

Also:

- Run GitHub Actions on PRs
- Set explicit permissions to read for better security. Workflows run
  with extended set of permissions by default. By specifying
  any permission explicitly, all others are set to none.
- Update actions to prevent deprecation warning messages
- Remove redundant `gem install bundler` (bundler is already available after
  setup-ruby action)
- Test against Rails 7.1 / Shakapacker 8 (allow failures)
- Test against multiple Ruby version
- Experimental tests against ruby-head

Ref: https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#permissions

.github/workflows/integration_test.yml

@@ -1,35 +1,44 @@
 name: Integration Tests
 
-on: [push]
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
 
 jobs:
   build:
     runs-on: ubuntu-latest
+
     strategy:
       matrix:
-        test-branch: [rails5, rails6, rails7]
-    timeout-minutes: 20
+        test-branch: [rails6, rails7, rails7-shakapacker]
+
+    continue-on-error: ${{ matrix.test-branch == 'rails7-shakapacker' }} # TODO: jamesmartin/inline_svg#156
+
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
     - name: Checkout test app
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
-        repository: jamesmartin/inline_svg_test_app
+        repository: tagliala/inline_svg_test_app
         ref: ${{ matrix.test-branch }}
         path: test_app
-    - name: Set up Ruby 2.7
+    - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.7.7
+        ruby-version: '3.3.2' # Ref: ruby/ruby#11006
+        bundler-cache: true
     - name: Build local gem
       run: |
-        gem install bundler
-        bundle install --jobs 4 --retry 3
         bundle exec rake build
     - name: Use the local gem in the test App
       id: uselocalgem
-      uses: jacobtomlinson/gha-find-replace@0.1.1
+      uses: jacobtomlinson/gha-find-replace@v3
       with:
         find: "gem 'inline_svg'"
         replace: "gem 'inline_svg', path: '${{github.workspace}}'"
@@ -41,6 +50,17 @@ jobs:
       run: |
         cd $GITHUB_WORKSPACE/test_app
         bundle install --jobs 4 --retry 3
+    - name: Set up Node.js 20.x
+      uses: actions/setup-node@v4
+      with:
+        node-version: 20
+      if: matrix.test-branch == 'rails7-shakapacker'
+    - name: Generate Shakapacker config
+      run: |
+        cd $GITHUB_WORKSPACE/test_app
+        yarn install --check-files
+        bundle exec rake shakapacker:compile
+      if: matrix.test-branch == 'rails7-shakapacker'
     - name: Test
       run: |
         cd $GITHUB_WORKSPACE/test_app

.github/workflows/ruby.yml

@@ -1,20 +1,36 @@
 name: Ruby
 
-on: [push]
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
 
 jobs:
   build:
 
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version: ['3.0', '3.1', '3.2', '3.3']
+        channel: ['stable']
+
+        include:
+          - ruby-version: 'head'
+            channel: 'experimental'
+
+    continue-on-error: ${{ matrix.channel != 'stable' }}
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Ruby 2.7
+    - uses: actions/checkout@v4
+    - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.7.7
-    - name: Build and test with Rake
+        ruby-version: '3.3'
+        bundler-cache: true
+    - name: Test with Rake
       run: |
-        gem install bundler
-        bundle install --jobs 4 --retry 3
         bundle exec rake