- Add patch from git upstream to work with latest box releases:
* box-4.0.patch

- Update to 2.2.3:
* Fix #236 added .local. files loading and module impersonation docs (#239)
* Replace key.upper with `upperfy` function that keeps `__` attributes (#240)
* Fix #241 new merge standards (#243)
* Add support for PRELOAD_ setting. (#244)
* Fixing how filename.local.* files are loaded (#238)
* fix crash on empty settings (#242)
* Fix #251 recursive call was using mutable memoized data (#254)
* Fix #266 created new variable FORCE_ENV to override ENV_FOR_DYNACONF
* Fix coverage for validators
* Add support for detecting duplicate validators being added (and ignore them) (#256)
* fix: env_loader.write: quote_mode for non-string values
* : added line break
* fix str comparison
* changing quote logic
* fix open error @py3.5
* Fix #258 custom message for validators
* Close #178. Included integration tests redis/vault
* Fix #273 add Flask load extensions method.
* Fix #145 allow lazy format using os.environ and settings values.
* Overriding strategy test
* Fix #203 document the usage with pytest (with examples)