Django-simple-captcha

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* Make DRF dependency optional

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* Fixed docs and test configuration
* Delete leftover temporary audio files (224, 225, 226 thanks dawidratynski and A-dead-pixel)
* Test against Django 5.1 and 5.2
* Add ability to control color of each character (PR 235, thanks mheidarian)
* Add support for Django REST Framework (PR 236, thanks michalwrona01)
* Audio CAPTCHA: try to detect the sample rate of the generated WAV file prior to merge (Issue 196)

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* Only Django versions 4.2 or above are now supported
* Removed the old rendering methods that were deprecated in 2017.

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* Still support Django 3.2 (222, thanks petrklus)

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* SECURITY ISSUE: reset the random seed after an image was generated (221, thanks ibuler)

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* Fix some typos in documentation (210, thanks stweil)
* Test against Django 4.2
* Stopped testing Django < 3.2
* BaseCaptchaTextInput should set autocomplete=off on the hashkey HiddenInput (201, thanks eerotal)
* Test against Django 4.2a
* Fix some deprecation warnings in Pillow 9.2+
* Removed old unused conditional imports
* Format code with pre-commit and black