update CI configuration and demo script to run the demo with Ruby 2.7.8 as a workaround for GitHub Action Ruby limitation.

.github/workflows/ci.yml

@@ -9,12 +9,14 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['3.1.0','head'] # test only recommend Ruby version (and stable version on the gitaction server)
-     #   ruby-version: ['2.7.4','3.1.0','head']
+        # test only recommend Ruby version (and stable version on the gitaction server)
+        # GitHub action github.com/ruby/setup-ruby is pretty unstable with older Ruby version + dependencies
+        #  so, we only run a basic example with Ruby 2.7.8 after install the gem from the local build
+        ruby-version: ['3.1.0','3.4.5'] 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Ruby ${{ matrix.ruby-version }}
-        uses: ruby/setup-ruby@359bebbc29cbe6c87da6bc9ea3bc930432750108
+        uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby-version }}
       - name: Install dependencies
@@ -29,3 +31,15 @@ jobs:
         env:
           SERPAPI_KEY: ${{ secrets.SERPAPI_KEY }}
         run: bundle exec rake oobt
+      - name: Run example with ruby 2.7.8
+        uses: ruby/setup-ruby@v1
+        if: matrix.ruby-version == '3.1.0'
+        with:
+          ruby-version: '2.7.8'
+      - name: Install and run demo 2.7.8
+        if: matrix.ruby-version == '3.1.0'
+        env:
+          SERPAPI_KEY: ${{ secrets.SERPAPI_KEY }}
+        run: |
+          gem install ./serpapi-*.gem
+          ruby demo/demo.rb

.gitignore

@@ -30,9 +30,6 @@ test.rb
 ## Text Editor
 .vscode
 
-Gemfile.lock
-build_table.rb
-
 # local script only
 /script
 README_ruby_EXAMPLE_SECTION.md

demo/demo.rb

@@ -9,6 +9,8 @@
 require 'pp'
 require 'serpapi'
 
+puts "SerpApi Ruby Client Example with Ruby version: #{RUBY_VERSION}"
+
 # client initialization with default parameters
 client = SerpApi::Client.new(
   engine: 'google',