Changed Go version

Author: Janos Pasztor

.github/workflows/tests.yml

@@ -12,6 +12,6 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.14
+          go-version: 1.16
       - name: Run go tests
         run: go test -cover -p 1 -v ./...