Released on 2019-02-12:

• gpg: Implement key lookup via keygrip (using the & prefix).
• gpg: Allow generating Ed25519 key from existing key.
• gpg: Emit an ERROR status line if no key was found with -k.
• gpg: Stop early when trying to create a primary Elgamal key. [T4329]​
• gpgsm: Print the card's key algorithms along with their keygrips in interactive key generation.
• agent: Clear bogus pinentry cache in the error case. [T4348]
• scd: Support "acknowledge button" feature.
• scd: Fix for USB INTERRUPT transfer. [T4308]
• wks: Do no use compression for the the encrypted challenge and response.

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See-also: https://lists.gnupg.org/pipermail/gnupg-announce/2019q1/000434.html