Support Gorm-style error checking

[cdignam-segment]

Gorm uses non-standard error format to support it's chainable API. It would be nice if there was a way to configure wrapcheck to match a *.\.Error regex

tx := tx.Find(&customer)
if tx.Error != nil {
    return nil, tx.Error // wrapcheck should warn here
}


abc := tx.Find(&customer)
if abc.Error != nil {
    return nil, abc.Error // wrapcheck should warn here
}

[tomarrell]

That should be possible, will just need a bit of a tweak to the AST matcher. I'll take a look when I get some time. If you want it sooner, I'm happy to review a PR.

[davideme]

@tomarrell any update on this? I would love to have support for Gorm