Error-tracker

- Fix 26
- Fix for Flask, flask model save is failing.

What's Changed
* Add support for Django 4 by jeduardo211 in https://github.com/sonus21/error-tracker/pull/24

New Contributors
* jeduardo211 made their first contribution in https://github.com/sonus21/error-tracker/pull/24

**Full Changelog**: https://github.com/sonus21/error-tracker/compare/v2.1.0...v3.0.0

This release has an additional setting that can be used for Django Admin UI support.

* Bug fixes in import model
* Added an abstract error model in Django
* Added ajax based search

* Added support for not sending similar notification
* Also duplicate ticket creation

Optional dependency bug fixes.