Implement autofix

[remyleone]

We got very large code base and doing it by hand seems long. Could you implement auto fix for this linter?

[kersten]

@remyleone great idea. Would you be able to propose a PR?

[remyleone]

I have no experience in writing linters and auto fix features.

[kersten]

@remyleone a colleague just found out that nlreturn has an autofix feature already. If you are using it with golang-lint it's not working, because they have implemented their own solution, which is not compatible with nlreturn. There is already an issue for it: golangci/golangci-lint#1779

[pierow2k]

It looks like golangci-lint v1.63.0 includes support for auto fix (--fix) that is compatible with nlreturn (via PR 5232).

In my limited testing, it seems to be working as expected.