Commercetools

------------------
Note this release has some breaking changes regarding imports and a lot of code is now autogenerated.

- Services are now generated by the RAML specification
- Optimize import times for faster startup by only loading necessary schemas
- Breaking: rename `commercetools.schemas.*` -> `commercetools._schema.*` since they are considered an implementation detail
- Fix incorrect schema in various nested fields
- Code generation now works with Python 3.8

------------------
- Testing: backend request mock parameters were case insensitive, causing expanding to fail in some cases

------------------
- Regenerate types (mainly Store distribution channels functionality)
- Store: distribution channel functionality including testing actions added

------------------
- Fixed API extensions endpoints
- Testing: add product change/add price actions

------------------
- Testing: use languages when creating store from draft

------------------
- Testing: add setLanguages to store testing backend