github: add windows job

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>

.github/workflows/main.yml

@@ -21,3 +21,21 @@ jobs:
         run:
           pip install mercurial==${{ matrix.hg }}
       - run: make test
+  test-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+      - uses: actions/cache@v3
+        id: cache-pip
+        with:
+          path: ~/appdata/local/pip/cache
+          key: pip-windows
+      - name: Install hg
+        run:
+          pip install mercurial
+      - name: Run all tests
+        run: |
+          make SHELL='C:/Program Files/Git/usr/bin/bash' -C test