Create a complete meta schema for 3.1

[darrelmiller]

[jdesrosiers]

I'll take a stab at this.

[MikeRalphson]

@jdesrosiers thanks, this is fantastic! Do you intend to rework the complete 3.0 OAS metaschema (i.e. not just the schemaObject) to reference this dialect?

[jdesrosiers]

@MikeRalphson I was going to, but @philsturgeon beat me to it #2474.

[MikeRalphson]

Closing as the PR has been merged. Thanks all!