build: add matrix strategy with go version (#1845)

.github/workflows/go.yml

@@ -11,6 +11,9 @@ on:
 
 jobs:
   build:
+    strategy:
+      matrix:
+        go: [ 1.16, 1.17 ]
     name: build & test
     runs-on: ubuntu-latest
     services:
@@ -42,7 +45,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.16
+          go-version: ${{ matrix.go }}
 
       - name: Build
         run: go build ./...