v1.6.4
- Default to variant specific image as primary image for FB.
- Add a Checkbox to allow override to use the parent product image.
- Don't sync items which have zero price.
- Existing 0 price items will be marked invisible after Force-Resync.
- Support Syncing Bookable Items with 'Display Cost' set.
- Fix 'Update' and 'Publish' for Bookable Items.
- Refactor log method to utils + other code cleanup.