Add CI jobs for `windows-latest` and `macos-latest`

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1a70ea03f9f973d1632ae776480e95085c5ac233..2ad6ccd7d65c72733c91be2df98691b099aca30d 100644 (file)
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -6,11 +6,12 @@ jobs:
   build:
     strategy:
       matrix:
+        platform: [ ubuntu-latest, macos-latest, windows-latest ]
         toolchain: [ stable, beta ]
         include:
           - toolchain: stable
             check-fmt: true
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.platform }}
     steps:
       - name: Checkout source code
         uses: actions/checkout@v2