Migrate Windows CI to Github Actions

I needed to workaround one test because on the Github Actions
environment, the test path is not the last feature to have been loaded.
The test is only concerned with it having been loaded, no matter in
which position, so adapt the assertion.

.github/workflows/windows.yml

@@ -0,0 +1,62 @@
+---
+
+name: windows
+
+on:
+  pull_request:
+
+  push:
+    branches:
+      - master
+
+jobs:
+  test:
+    runs-on: windows-2019
+
+    strategy:
+      matrix:
+        version: [2.4.9, 2.5.7, 2.6.5, head]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/cache@v1
+        with:
+          path: .bundle
+          key: gems-${{ hashFiles('**/Gemfile.lock') }}
+
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.version }}
+
+      - name: Clone patched rb-readline
+        shell: cmd
+        run: git clone -q --depth=5  --no-tags --branch=byebug https://github.com/deivid-rodriguez/rb-readline.git C:\rb-readline
+
+      - name: Install patched rb-readline
+        run: |
+          $env:n_dir = (&ruby.exe -e "puts RbConfig::CONFIG['sitelibdir']" | Out-String).Trim()
+          Copy-Item -Path C:\rb-readline\lib\readline.rb -Destination $env:n_dir\readline.rb
+          Copy-Item -Path C:\rb-readline\lib\rbreadline.rb -Destination $env:n_dir\rbreadline.rb
+
+      - name: Display environment information
+        shell: cmd
+        run: |
+          echo %PATH%
+
+          ruby --version
+          where ruby
+
+          gem --version
+          where gem
+
+          bash --version
+          where bash
+
+      - name: Setup dependencies
+        shell: bash
+        run: bin/setup.sh
+
+      - name: Run tests
+        run: ruby bin/rake compile test
+        continue-on-error: ${{ matrix.version == 'head' }}

test/runner_against_valid_program_test.rb

@@ -84,7 +84,7 @@ def test_run_with_require_flag
       stdout = run_byebug(
         "-r", example_path, example_path,
         input: \
-          "puts \"Example path loaded? \#{$LOADED_FEATURES.last == '#{example_path}'}\""
+          "puts \"Example path loaded? \#{$LOADED_FEATURES.include?('#{example_path}')}\""
       )
 
       assert_match(/Example path loaded\? true/, stdout)