let_var_whitespace should not trigger for @objc

[fcy]

I like the new let_var_whitespace rule but I think it shouldn't trigger for @objc because it applies to that member. E.g. the following snippet triggers a violation:

    @objc(status)
    var statusObjc: String {
//...

What do you think?

[Uncommon]

Yeah, that should be easy to fix. I got it to handle a couple of other @ keywords but didn't think of @objc.