Update test.yml

Author: Willenbrink

.github/workflows/test.yml

@@ -36,6 +36,18 @@ jobs:
     - run: brew install postgresql@15 && brew link --overwrite postgresql@15
       if: runner.os == 'macOS'
 
+    # Windows does not come with Perl installed
+    - if: runner.os == 'Windows'
+      uses: shogo82148/actions-setup-perl@v1
+      with:
+        perl-version: '5.32'
+
+    - name: Install PostgreSQL (Windows)
+      if: runner.os == 'Windows'
+      run: |
+        choco install postgresql --yes
+        echo "C:\Program Files\PostgreSQL\15\bin" >> $GITHUB_PATH
+
     # Workaround https://github.com/savonet/ocaml-ssl/issues/155 and/or
     # https://github.com/ocaml/setup-ocaml/issues/856.
     - run: opam pin add ssl 0.6.0 --no-action