Update Golang to 1.20.

MrHohn · MrFreezeex · commit 4e858b76bd8d · 2023-03-03T09:58:52.000+01:00
Also pin golangci-lint to v1.51.2 to avoid a memory leak issue: golangci/golangci-lint#3565.
diff --git a/Makefile b/Makefile
@@ -60,7 +60,7 @@ ARCH := $(if $(GOARCH),$(GOARCH),$(shell go env GOARCH))
 
 TAG := $(VERSION)__$(OS)_$(ARCH)
 
-GO_VERSION := 1.19.4
+GO_VERSION := 1.20
 BUILD_IMAGE := golang:$(GO_VERSION)-alpine
 
 BIN_EXTENSION :=
diff --git a/build/lint.sh b/build/lint.sh
@@ -22,7 +22,7 @@ export CGO_ENABLED=0
 export GO111MODULE=on
 
 cd tools >/dev/null
-go install github.com/golangci/golangci-lint/cmd/golangci-lint
+go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.51.2
 cd - >/dev/null
 
 echo -n "Running golangci-lint: "
diff --git a/go.mod b/go.mod
@@ -1,6 +1,6 @@
 module github.com/kubernetes-sigs/cluster-proportional-autoscaler
 
-go 1.19
+go 1.20
 
 require (
 	github.com/davecgh/go-spew v1.1.1

-Original file line number
+Diff line change
@@ @@ -1,6 +1,6 @@ @@
 module github.com/kubernetes-sigs/cluster-proportional-autoscaler
 -go 1.19
 +go 1.20
 require (
 	github.com/davecgh/go-spew v1.1.1