ci: bump go version

Author: barelyhuman

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.13
+          go-version: 1.16
 
       - name: Build
         run: go build -v ./...