Fix: Marshall old Vinyl objects to new Version in dest()

[phated]

@erikkemperman @asgoth @stevelacy @doowb What do y'all think of this as the solution to #288 and gulpjs/gulp/issues/2065

[doowb]

@phated LGTM! I like that a new Vinyl instance is created only when an old Vinyl instance is detected.

[erikkemperman]

Not sure if we call isSymbolic() there, but if so should this be done for symlink and even src as well? And perhaps add a comment that this is to deal with out-of-date plugins and hopefully could be removed at some point?

[stephenlacy]

I do also agree with @erikkemperman relating to also check/modify symlink. The rest looks good

[phated]

@erikkemperman @stevelacy I've added the marshalling to .symlink but I don't think it's necessary because we don't check .isSymbolic() in that API - (.src actually always marshalls in the wrap-file stream). I've also added erik's requested TODO.

[erikkemperman]

@phated Looks good to me, thanks!

[phated]

@erikkemperman @doowb @stevelacy Thanks for reviewing this!