CI multiple OSes

.github/workflows/ci.yml

@@ -1,23 +1,24 @@
 name: CI
+on: [push, pull_request]
 
-on:
-  push:
-    branches:
-      - main
-  pull_request:
-    branches:
-      - main
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 
 jobs:
   test:
-    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
         node-version:
           - 18.x
           - 20.x
           - 22.x
+        os:
+          - macos-latest
+          - ubuntu-latest
+          - windows-latest
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
@@ -30,8 +31,8 @@ jobs:
       - run: yarn test
 
   spec:
-    runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
         spec:
           - spec:all
@@ -40,6 +41,11 @@ jobs:
           - 18.x
           - 20.x
           - 22.x
+        os:
+          - macos-latest
+          - ubuntu-latest
+          - windows-latest
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}