Django 4.0 incompatibilities#200

Django release 4.0 has introduced some incompatibilities but they are all quite benign. 1. django/utils/encoding#force_text has been removed. It was previously deprecated. `force_str` can be used as a direct replacement and was aliased. Available since Feb 2019 https://github.com/django/django/commit/3bb6a4390c0a57da991fcb1c0642b9b3fccff751 `force_text` was deprecated shortly after in https://github.com/django/django/commit/d55e88292723764a16f0689c73bc7e739dfa6047 `force_text` was then removed in the v4 release cycle as per the deprecation notice https://github.com/django/django/commit/810f037b29402f848a766f6900b4ebfbaf64cc88 2. `Signal` has lost the `provided_args` initialiser argument This argument was deprecated in Mar 2020 at https://github.com/django/django/commit/769cee525222bb155735aba31d6174d73c271f3c And subsequently removed in Jan 2021 at https://github.com/django/django/commit/1adcf20385c2856d3655089ff7a0b55b32e5587a I don't know which previous versions of Django this affects or how backwards compatible you want to be, but I'll post a RP with these changes to run through Django v4.0