v3.1.0

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Released 2024-11-13

• Drop support for Python 3.8. :pr:5623
• Update minimum dependency versions to latest feature releases.
  Werkzeug >= 3.1, ItsDangerous >= 2.2, Blinker >= 1.9. :pr:5624,5633
• Provide a configuration option to control automatic option
  responses. :pr:5496
• Flask.open_resource/open_instance_resource and
  Blueprint.open_resource take an encoding parameter to use when
  opening in text mode. It defaults to utf-8. :issue:5504
• Request.max_content_length can be customized per-request instead of only
  through the MAX_CONTENT_LENGTH config. Added
  MAX_FORM_MEMORY_SIZE and MAX_FORM_PARTS config. Added documentation
  about resource limits to the security page. :issue:5625
• Add support for the Partitioned cookie attribute (CHIPS), with the
  SESSION_COOKIE_PARTITIONED config. :issue:5472
• -e path takes precedence over default .env and .flaskenv files.
  load_dotenv loads default files in addition to a path unless
  load_defaults=False is passed. :issue:5628
• Support key rotation with the SECRET_KEY_FALLBACKS config, a list of old
  secret keys that can still be used for unsigning. Extensions will need to
  add support. :issue:5621
• Fix how setting host_matching=True or subdomain_matching=False
  interacts with SERVER_NAME. Setting SERVER_NAME no longer restricts
  requests to only that domain. :issue:5553
• Request.trusted_hosts is checked during routing, and can be set through
  the TRUSTED_HOSTS config. :issue:5636