CI: Enable testing on Windows

Author: amotl

.github/workflows/tests.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest, macos-latest, windows-2019]
         python-version: ['3.7', '3.8', '3.9', '3.10']
         cratedb-version: ['4.8.0']
         sqla-version: ['1.3.24']