Make lofty implement more commonly used vorbis comment fields

[rudolfkastl]

Summary

Hello everyone,

It would be great to see lofty support additional commonly used fields for vorbis comments. Specifically i am missing a "tag.set_date".

Please see the list of "commonly used fields" here: https://www.xiph.org/vorbis/doc/v-comment.html

API design

No response

[Serial-ATA]

Hello!

Do you mean add more method on VorbisComments? or on Tag?

For VorbisComments, I'd accept a PR to add a set_date method that takes a Timestamp.

In the case of Tag though, the set_* methods typically come from the Accessor trait. That trait is implemented for all tag types, meaning there should only really be methods for items that can be represented across all tags, so it may not have all the items you're looking for.

In either case, you can always use Tag::insert() or VorbisComments::insert() with a Timestamp string.