ci: add windows and macos

.github/workflows/ci.yml

@@ -6,17 +6,20 @@ on:
   pull_request:
     branches:
       - main
+
 jobs:
   test:
-    name: test ${{ matrix.python-version }}
-    runs-on: ubuntu-latest
+    name: ${{ matrix.os }} - py${{ matrix.python-version }}
+    runs-on: ${{ matrix.os }}-latest
     strategy:
       fail-fast: false
       matrix:
+        os: ["ubuntu", "windows", "macos"]
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
     defaults:
       run:
         shell: bash
+
     steps:
     - uses: actions/checkout@v2
 
@@ -42,7 +45,10 @@ jobs:
     - name: Publish coverage
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      if: github.event_name != 'pull_request'
       run: |
         pip install coveralls
         coveralls --service=github
+      if: |
+        github.event_name != 'pull_request' &&
+        matrix.os == 'ubuntu' &&
+        matrix.python-version == '3.10'