Django-oscar-cch

Fix

- storage format of empty taxation messages

Fix

- circular import issues

Fix

- add proxy and timeout settings

Feat

- add type annotations
- migrate SOAP client from instrumented-soap to zeep

Fix

- **deps**: update dependency django to ^4.2.18
- **deps**: update dependency django to ^4.2.17

Fix

- **deps**: update dependency django-oscar to v3.2.5
- pin django-oscar version due to breaking changes in patch versions
- **deps**: update dependency django to ^4.2.16
- **deps**: update dependency instrumented-soap to ^2.1.2

Fix

- **deps**: update dependency django to ^4.2.15