CI: Add Windows

Author: mrkn

.github/workflows/ubuntu.yml

@@ -1,8 +1,14 @@
-name: CI
+name: CI on Ubuntu
 
 on:
-- push
-- pull_request
+  push:
+    branches:
+    - master
+  pull_request:
+    types:
+    - opened
+    - synchronize
+    - reopened
 
 jobs:
   test:

.github/workflows/windows.yml

@@ -0,0 +1,66 @@
+name: CI on Windows
+
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    types:
+    - opened
+    - synchronize
+    - reopened
+
+jobs:
+  test:
+    name: Test
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+        - windows-latest
+        ruby:
+        - mswin
+        - mingw
+        - 2.7
+        - 2.6
+        - 2.5
+        - 2.4
+        - 2.3
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 1
+
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby }}
+
+    - name: Install requirements on vcpkg
+      run: |
+        vcpkg install zeromq:x64-windows
+        vcpkg install czmq:x64-windows
+        vcpkg install libffi:x64-windows
+
+    - run: pip3 install -r ci/requirements.txt
+
+    - run: gem install bundler
+
+    - run: bundle install --jobs 4 --retry 3
+
+    - name: Run tests
+      env:
+        PYTHON: python3
+        ADAPTERS: cztop ffi-rzmq pyzmq
+      run: |
+        for adapter in $ADAPTERS; do
+          export IRUBY_TEST_SESSION_ADAPTER_NAME=$adapter
+          bundle exec rake test TESTOPTS=-v
+        done
+      shell: bash
+
+    - run: rake build
+
+    - run: gem install pkg/*.gem