update workflow

.github/workflows/go.yml

@@ -7,16 +7,19 @@ on:
     branches: [ master ]
 
 jobs:
-
   build:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go-version: [ 1.13, 1.16 ]
+        os: [ ubuntu-latest, macos-latest, windows-latest ]
+    runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v2
+      - uses: actions/checkout@v2
 
-    - name: Set up Go
-      uses: actions/setup-go@v2
-      with:
-        go-version: 1.16
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
 
-    - name: Make check
-      run: make check
+      - name: Make check
+        run: make check