Run CI on more platforms

.github/workflows/ci.yml

@@ -8,8 +8,8 @@ on:
 
 jobs:
   install:
-    name: Rust ${{matrix.rust}}
+    name: Rust ${{matrix.rust}} ${{matrix.os}}
-    runs-on: ubuntu-latest
+    runs-on: ${{matrix.os}}
     strategy:
       fail-fast: false
       matrix:
@@ -23,6 +23,11 @@ jobs:
           "beta",
           "stable",
         ]
+        os: [
+          "ubuntu-latest",
+          "windows-latest",
+          "macos-latest",
+        ]
     steps:
       - uses: actions/checkout@v3
       # Test toolchain file support