Try many platforms

Author: stroiman

.github/workflows/go.yml

@@ -12,12 +12,23 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
-    # name: Build and test on ${{ matrix.os }} ${{ matrix.arch }}
-    # strategy:
-    #   matrix:
-    #     os: [darwin, linux]
-    #     arch: [amd64, arm64]
+    name: Tests on ${{ matrix.os }} ${{ matrix.arch }} with Go ${{ matrix.go-version }}
+    strategy:
+      matrix:
+        os: [darwin, linux]
+        arch: [amd64]
+        go-version:
+        # Check the earliest and two trailing versions, to keep
+        # maintainance of this file reasonable.
+        - 1.19
+        - oldstable
+        - stable
+        include:
+        - os: linux
+          platform: ubuntu-latest
+        - os: darwin
+          platform: macos-latest
+    runs-on: ${{ matrix.platform }}
     steps:
     - uses: actions/checkout@v4