Add test-windows CI

Author: waych

.github/workflows/ci.yml

@@ -77,3 +77,17 @@ jobs:
           toolchain: stable
       - name: Run Rust tests
         run: PATH_TO_GIT="$PWD"/git cargo test
+
+  test-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+      - name: Run Rust tests
+        run: |
+          $env:PATH_TO_GIT='C:\Program Files\Git\cmd\git.exe'
+          cargo test