Update django-simple-history to 2.9.0

[pyup-bot]

This PR updates django-simple-history from 2.8.0 to 2.9.0.

Changelog

2.9.0

------------------
- Add simple filtering if provided a minutes argument in `clean_duplicate_history` (gh-606)
- Add setting to convert `FileField` to `CharField` instead of `TextField` (gh-625)
- Added notes on BitBucket Pipelines (gh-627)
- import model `ContentType` in `SimpleHistoryAdmin` using `django_apps.get_model`
to avoid possible `AppRegistryNotReady` exception (gh-630)
- Fix `utils.update_change_reason` when user specifies excluded_fields (gh-637)
- Changed how `now` is imported from `timezone` (`timezone` module is imported now) (gh-643)
- settings.SIMPLE_HISTORY_REVERT_DISABLED if True removes the Revert
button from the history form for all historical models (gh-632))

Links

• PyPI: https://pypi.org/project/django-simple-history
• Changelog: https://pyup.io/changelogs/django-simple-history/
• Repo: https://github.com/treyhunner/django-simple-history

[codecov]

Codecov Report

Merging #1572 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1572   +/-   ##
=======================================
  Coverage   76.26%   76.26%           
=======================================
  Files         123      123           
  Lines        4580     4580           
  Branches      547      547           
=======================================
  Hits         3493     3493           
  Misses        912      912           
  Partials      175      175           

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