v0.0.8 breaks when go.mod is not in repo root

[thejan2009]

The issue was introduced with #25. Cmd breaks when the go.mod is located in a subpath. Example structure:

project
├── .git
└── go
    ├── go.mod
    └── main.go

One way to solve this would be finding the go mod root. go env GOMOD returns the correct value or os.DevNull if if can't find one.

[thejan2009]

I opened a fix PR in golangci-lint golangci/golangci-lint#3748 and propose the changes from v0.0.8 are partially reverted.