Raven

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* Restored support for patching Django's BaseCommand.execute.

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* The UDP transport has been removed.
* The integrated Sentry+Django client has been removed. This is now part of Sentry core.
* Server configuration *must* now be specified with a DSN.
* Upstream errors now have increased verbosity in logs.
* Unsent events now log to 'sentry.errors.uncaught'.
* Django management commands should now effectively autopatch (when run from the CLI).
* Flask wrapper now includes user_context, tags_context, and extra_context helpers.
* Python version is now reported with modules.

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* Protocol version is now 6 (requires Sentry 7.0 or newer).
* Added ``release`` option to Client.
* Added ``fetch_git_sha`` helper.
* Added ``fetch_package_version`` helper.
* Added cookie string sanitizing.
* Added threaded request transport: "threaded+requests+http(s)".

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* Added aiohttp transport.
* Corrected behavior with auto_log_stacks and exceptions.
* Add support for certifi.
* Expanded Flask support.
* Expanded Django support.
* Corrected an issue where processors were not correctly applying.

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* Sentry client protocol is now version 5.
* Various improvements to threaded transport.

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* SSL verification is now on by default.
* Rate limits and other valid API errors are now handled more gracefully.
* Added ``last_event_id`` and ``X-Sentry-ID`` header to Flask.