update Libauth to latest next version (3.1.0-next.7)

[mr-zwets]

we can follow the Libauth @next updates on this branch:

https://github.com/bitauth/libauth/commits/changeset-release/next

[mainnet-pat]

3.1.0-next.8 got released 19 hours ago. https://github.com/bitauth/libauth/commits/next/