Add wrapcheck linter

[tomarrell]

This PR introduces the wrapcheck linter.

There is a more extensive write-up about the functionality and justification for this linter here: https://blog.tomarrell.com/post/introducing_wrapcheck_linter_for_go

The test added here is just a minimal example, there is a more extensive suite included in the repository.

[boring-cyborg]

Hey, thank you for opening your first Pull Request !

[CLAassistant]

All committers have signed the CLA.

[Nivl]

Looks good to me, I'll approve once you fixed the conflicts.

[tomarrell]

Cheers for that @Nivl, have resolved the conflict. Should be good to go.

[Nivl]

Looks good, thanks!

[tomarrell]

@Nivl, just wondering if there is anything else that needs to be done before this can be merged? I don't have write access.

Thanks! 🙂

[bombsimon]

Nope, let's merge this! Thanks for the PR!

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