Bump golang to 1.20

.github/workflows/ci.yaml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.19
+          go-version: '>=1.20.0'
 
       - uses: actions/checkout@v2
         with:

builder/Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.19
+FROM golang:1.20
 LABEL maintainer="Marcin Wielgus <mwielgus@google.com>"
 
 ENV GOPATH /gopath/

cluster-autoscaler/go.mod

@@ -1,6 +1,6 @@
 module k8s.io/autoscaler/cluster-autoscaler
 
-go 1.19
+go 1.20
 
 require (
 	cloud.google.com/go/compute/metadata v0.2.3