Update build procedure

Author: vrutkovs

hack/build-go.sh

@@ -3,7 +3,7 @@
 set -eu
 
 REPO=github.com/openshift/cluster-version-operator
-GOFLAGS=${GOFLAGS:-}
+GOFLAGS=${GOFLAGS:--mod=vendor}
 GLDFLAGS=${GLDFLAGS:-}
 
 eval $(go env | grep -e "GOHOSTOS" -e "GOHOSTARCH")

hack/update-vendor.sh

@@ -8,6 +8,7 @@ set -euo pipefail
 cd "$(git rev-parse --show-cdup)"
 
 # Run dep.
-dep ensure
+go mod vendor
+go mod verify
 
 (cd hack && ./update-codegen.sh)