ci: Update golang version in CI (PROJQUAY-1605)

- Use Go 1.16 in CI

.github/workflows/go.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Set up Go 1.x
         uses: actions/setup-go@v2
         with:
-          go-version: ^1.13
+          go-version: ^1.16
         id: go
 
       - name: Check out code into the Go module directory
@@ -34,7 +34,7 @@ jobs:
   tests:
     name: Tests
     runs-on: ubuntu-latest
-    container: docker.io/library/golang:1.14-buster
+    container: docker.io/library/golang:1.16-buster
     services:
       postgres:
         image: postgres:11.5
@@ -61,6 +61,8 @@ jobs:
         run: go build -v ./...
       - name: Tests
         run: go test ./pkg/lib/fieldgroups/...
+        env:
+          GODEBUG: x509ignoreCN=0
 
   commit-check:
     name: Commit Check