Django-oscar

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- Internationalization
- Add PreQual request data into PreQualificationResponseSerializer serializer
- Add view to allow resuming a PreQual offer from a different session

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- Make payment methods create separate ``payment.Source`` objects per Reference number (`!24 <https://gitlab.com/thelabnyc/django-oscar/django-oscar-wfrs/merge_requests/24>`_).
- Change behavior of denied and pended credit applications. Application records are now always saved to the database (`!26 <https://gitlab.com/thelabnyc/django-oscar/django-oscar-wfrs/merge_requests/26>`_).
- Made Fraud screen system fail-open (rather than closed, denying all orders) upon returning an error.

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- Improve Pre-Qualification Dashboard.
- Adds new columns
- Improves search using Haystack
- Adds export ability
- Add financing advertising thresholds to the API

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- Fix widget rendering issue in Django 2.1

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- Extend PreQual views to work with new Wells Fargo Pre-Approval SDK.
- Record transaction records for denied transaction attempts.
- Add support for Django 2.1
- Add support for Python 3.7

- Fix bug in CompoundBenefit which caused lines to not be properly
consumed by a condition if the last-to-be-applied child benefit
didn't trigger a discount.