Matrix test across mac/win/linux

Author: joho

.github/workflows/ci.yml

@@ -4,11 +4,12 @@ on: [push]
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         go: [ '1.15', '1.14' ]
-    name: Go ${{ matrix.go }} Tests
+        os: [ ubuntu-latest, macOS-latest, windows-latest ]
+    name: ${{ matrix.os }} Go ${{ matrix.go }} Tests
     steps:
       - uses: actions/checkout@v2
       - name: Setup go