This release is v1.4.0 with support for the following non-standardized features:

• Presistent symmetric keys experimental + latest draft draft-ietf-openpgp-persistent-symmetric-keys-00
• Automatic forwarding draft-wussler-openpgp-forwarding-00
• Post-quantum algorithms draft-ietf-openpgp-pqc (Updated to draft-ietf-openpgp-pqc-09)