Spec1.0 Support

This code is not complete and should not be merged until it is because we default to sending with the latest version when version isn't specifically configured for an LRS. But I wanted to get it out there in case anyone comes hunting, and/or anyone would like to comment on 1.0 changes ahead of release.

Requirements:

- [x] Bump version list
- [x] Context Activities as arrays
- [x] deprecated 'voided'
- [x] Add Statement version property
- [ ] Statement attachments
- [ ] Query API (authoritative removal, mode expansion)
- [ ] Fetch of URL related items
- [ ] Anonymous Groups
- [ ] Document merge/partial updates (State, Activity Profile, Agent Profile)
- [ ] Statement signing