ci: add coverage for freebsd

Author: flavorjones

.github/workflows/ci.yml

@@ -272,3 +272,24 @@ jobs:
           bundler-cache: true
       - run: bundle exec rake compile
       - run: bundle exec rake test
+
+  bsd:
+    needs: ["basic"]
+    strategy:
+      fail-fast: false
+      matrix:
+        sys: ["enable", "disable"]
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - uses: vmactions/[email protected]
+        with:
+          usesh: true
+          prepare: pkg install -y ruby devel/ruby-gems pkgconf libxml2 libxslt
+          run: |
+            gem install bundler
+            bundle install --local || bundle install
+            bundle exec rake compile -- --${{matrix.sys}}-system-libraries
+            bundle exec rake test