Add Ruby 3.3 to CI (#143)

This PR adds Ruby 3.3 to CI. It also changes the timeout for an
integration test case because it seemed to fail on Ruby 3.3, presumably
due to Ruby 3.3 running slower.

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['2.7', '3.0', '3.1', '3.2']
+        ruby: ['2.7', '3.0', '3.1', '3.2', '3.3']
 
     steps:
       - name: Checkout
@@ -41,7 +41,7 @@ jobs:
       fail-fast: false
       matrix:
         adapter: [ 'mysql2', 'pg', 'sqlite3' ]
-        ruby: [ '2.7', '3.0', '3.1', '3.2' ]
+        ruby: [ '2.7', '3.0', '3.1', '3.2', '3.3' ]
 
     steps:
       - name: Checkout

spec/integration/rails_generator_install_spec.rb

@@ -44,7 +44,7 @@
       expect(exist?(rake_task_file)).to be_truthy
 
       # TODO: Improve this so we don't have to rely on `exit_timeout`
-      _cmd = run_command(generator_install_command, exit_timeout: 3)
+      _cmd = run_command(generator_install_command, exit_timeout: 5)
       # Because the rake task file already exists, there will be a conflict in the Rails generator.
       # The prompt should look something like this:
       #