fix flake stuff
bump deps
plus lock
A pledge(2) and unveil(2)'d tool for verifying GnuPG signatures.
./ogvt -file test/uptime.txt -sig test/uptime.txt.asc -pub test/adent.pub
"Arthur Dent <adent@in.space.time>" (85A37DE03BBE9A3019A7E3A43BC546AF2E6705B7)
Signature OK.
./ogvt -file test/uptime.txt.bad -sig test/uptime.txt.asc -pub test/adent.pub
openpgp: invalid signature: hash tag doesn't match