v3.1.0

🚀 Features

• feat: implement the legacy Function Call sub-protocol ('F'/'V')
  by Eray Hanoğlu @erayhanoglu
• feat: support protocol 3.2's longer cancellation key (PostgreSQL 18+)
  by Eray Hanoğlu @erayhanoglu

🪲 Fixes

• fix: correctly parse NegotiateProtocolVersion and expose it on Connection
  by Eray Hanoğlu @erayhanoglu