Update go mod to indicate usage of go 1.19+

[VamshikShetty]

VM operator’s go mod indicates it leveraging go 1.18 but when running make lint-go-full I’m facing an error that indicates few dependencies versions are suitable for go 1.19

Steps to duplicate the issue :

1. Start a container with go 1.18 alpine :

docker run --name test-18 -it golang:1.18.0-alpine

2. Inside the docker run following cmds :

apk update
apk add --no-cache bash git make build-base

git clone https://github.com/vmware-tanzu/vm-operator.git
cd vm-operator

make lint-go-full

Output :

make -C hack/tools golangci-lint
make[1]: Entering directory '/go/vm-operator/hack/tools'
go build -tags=vmop_tools -o bin/golangci-lint github.com/golangci/golangci-lint/cmd/golangci-lint
go: downloading github.com/golangci/golangci-lint v1.51.2
go: downloading github.com/fatih/color v1.14.1
go: downloading github.com/gofrs/flock v0.8.1
.
.
.
go: downloading github.com/pelletier/go-toml v1.9.5
go: downloading github.com/mattn/go-runewidth v0.0.9
# honnef.co/go/tools/unused
/go/pkg/mod/honnef.co/go/[email protected]/unused/unused.go:419:14: obj.Origin undefined (type *types.Var has no field or method Origin)
/go/pkg/mod/honnef.co/go/[email protected]/unused/unused.go:421:14: obj.Origin undefined (type *types.Func has no field or method Origin)
note: module requires Go 1.19
# honnef.co/go/tools/staticcheck
/go/pkg/mod/honnef.co/go/[email protected]/staticcheck/lint.go:4025:29: righti.Method(i).Origin undefined (type *types.Func has no field or method Origin)
/go/pkg/mod/honnef.co/go/[email protected]/staticcheck/lint.go:4030:36: sel.Obj().(*types.Func).Origin undefined (type *types.Func has no field or method Origin)
note: module requires Go 1.19
make[1]: *** [Makefile:78: bin/golangci-lint] Error 2
make[1]: Leaving directory '/go/vm-operator/hack/tools'
make: *** [Makefile:181: hack/tools/bin/golangci-lint] Error 2

It passed for golang:1.20.0-alpine & golang:1.19.0-alpine

Go mod needs to be edited to indicate that we need to run go 1.19 or at-least those dependencies needs to be downgraded.