Bring draft-next up to date with the latest spec changes

[jdesrosiers]

This brings the draft-next tests up to date with the latest spec changes.

Change log

• Rename draft-next to v1 -- We're no longer calling releases "drafts".
• Remove optional vocabulary tests -- The way optional vocabularies work has changed because we no longer allow unknown keywords. All of the existing tests should result in an error. Since we don't have a way of testing errors, the tests were removed.
• Remove tests that make a dynamic reference to a location that isn't a dynamic anchor -- That behavior is now an error and we don't have a way of testing for errors.
• Remove tests that use the initial resolution dynamic reference step -- It's now an error to have anything before the # in a dynamic reference.
• Format validation is now on by default -- The format tests were moved from optional to the required set. The annotation-only format tests were moved to optional. NOTE: I kept the format tests in folder. That might affect some existing test runners that aren't expecting that. I can change that something flat (like format-hostname.json, format-email.json, etc) if that's preferred.
• Removed tests for enabling the format validation through vocabularies -- There's now only one version of format. The vocabulary extension could be updated to define a format-annotation vocabulary and we could have test that use that. For now that doesn't exist, so the test were removed.

There are probably things I missed. I tested the changes with my implementations that's mostly caught up with the changes. However, it's possible I've missed something.

NOTE: With the rename, the diff is quite large. I recommend reviewing one commit at a time to make it more manageable.