v0.6.0

• Docs: template history now records the sender. Each entry from the template
  versions call carries from, reply_to and sender_recorded, an update
  that changes only the From or Reply-To records a version (or folds into the
  open one, like any edit), and restoring a version brings its From and
  Reply-To back with the design. A version with sender_recorded false was
  recorded before this change and leaves the current From and Reply-To alone
  when restored. The behaviour comes from the API and reaches every SDK
  version on deploy; only the doc comments change here.

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Released from mailtea-app/mailtea@ff8e7ef.