chore: adding GitHub Actions CI builds

This workflow file runs the RSpec testsuite on Ruby 3.1, 3.2, and 3.3.

.github/workflows/ruby.yml

@@ -0,0 +1,37 @@
+# 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: Ruby
+
+on:
+  push:
+    branches: [ "*" ]
+  pull_request:
+    branches: [ "master" ]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version: ['3.1', '3.2', '3.3']
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Ruby
+    # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
+    # change this to (see https://github.com/ruby/setup-ruby#versioning):
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - name: Run tests
+      run: bundle exec rake spec

xapian_db.gemspec

@@ -27,7 +27,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "ruby-progressbar"
   s.add_development_dependency "resque",           ">= 1.19.0"
   s.add_development_dependency "sidekiq",          "~> 7.1"
-  s.add_development_dependency "xapian-ruby",      "= 1.4.17"
+  s.add_development_dependency "xapian-ruby",      "= 1.4.22"
   s.add_development_dependency "pry-rails"
   s.add_development_dependency "descendants_tracker"