0.4.0

Changed — may break callers

• A call with no outcome may have ended. Before, a call message with no outcome in provider_metadata was
  always still ringing. Now a call that ends for a reason wa does not know is kept as "Voice call" with no
  outcome, so it does not pass as missed or answered. A script that reads a missing outcome as "ringing" should
  read the text as well: a ringing call's text starts with "Incoming".

Fixed

• A call answered or declined on your phone is stored as answered or declined, not missed. While serve or
  watch runs, WhatsApp tells a linked device only that the call was taken or turned down on another device, and
  wa read every such end as missed. Now a call you answer on the phone is "Voice call" with outcome: answered,
  one you decline is "Declined voice call", and one that rang out or that the caller hung up before you answered is
  "Missed voice call", as the phone shows it. An answered call taken on the phone has no duration: this device does
  not hear when it ends, and wa no longer stores 0 for it. A call that rang while serve was not running, and
  whose end the reconnect does not bring, is stored as missed instead of staying "Incoming voice call".