Release libagent 0.16.1

Merge pull request #517 from romanz/gpg-userids

Merge pull request #519 from romanz/passphrase

Fix passphrase support on Trezor

Fix `load_by_keygrip()` docstring

Lookup GnuPG user ID (instead of assuming it's the first one)

Switch to trezorlib 0.20

Merge pull request #510 from nitramiz/libagent-add-jade-plus-dev-id

libagent: Add USB IDs for Jade Plus

Drop ledger support

Drop keepkey support

Parse SSH server host key as well

Dedup sending age response

Merge pull request #480 from branchvincent/3.12

Merge remote-tracking branch 'origin/master'