Shopifyapi

- Adds InventoryItem resource
- Adds InventoryLevel resource
- Adds GiftCardAdjustment resource
- Fix to properly handle byte data for Asset.attach()

- Added CollectListing resource
- Added ResourceFeedback resource
- Added StorefrontAccessToken resource
- Added ProductListing resource
- Removed deprecated ProductSearchEngine resource
- Removed deprecated Discount resource
- Fixed Python3 compatibility issue with `Image.attach_image()`

- Added support for Marketing Event API through Marketing Event resource

- Fixed an issue preventing creation of Order Risk resources

- Added Price Rule and Discount Code resources

- Add support for report publishing