Tasktiger

* Implement heartbeat with synchronous TaskTiger worker ([331](https://github.com/closeio/tasktiger/pull/331))

* Adding synchronous (non-forking) executor ([319](https://github.com/closeio/tasktiger/pull/319), [320](https://github.com/closeio/tasktiger/pull/320))
* If possible, retry tasks that fail with "execution not found" ([323](https://github.com/closeio/tasktiger/pull/323))
* Option to exit TaskTiger after a certain amount of time ([324](https://github.com/closeio/tasktiger/pull/324))

* Purge errored tasks even if task object is not found ([310](https://github.com/closeio/tasktiger/pull/310))

* Added `current_serialized_func` property to `TaskTiger` object ([296](https://github.com/closeio/tasktiger/pull/296))

* Added support for Redis >= 6.2.7 ([268](https://github.com/closeio/tasktiger/issues/268))

⚠️ Breaking changes

* Removed `execute_pipeline` script ([284](https://github.com/closeio/tasktiger/pull/284))

Other changes

* Added typing to more parts of the codebase
* Dropped Python 3.7 support, added Python 3.11 support
* Added CI checks to ensure compatibility on redis-py versions (currently >=3.3.0,<5)

Other changes

* Add 'task_func' to logging processor ([265](https://github.com/closeio/tasktiger/pull/265))
* Deprecate Flask-Script integration ([260](https://github.com/closeio/tasktiger/pull/260))