Another minor release candidate that adds more validation. This time for when an item is updated.
Fixed: Cart removes items correctly if the product is no longer purchasable when cart contents is fetched. Tweaked: Update item now validates if the product is sold individually to prevent item from updating if true. Dev: Added filter cocart_update_cart_validation to allow plugin developers to pass their own validation before item is updated in the cart.
If you discover any bugs during the testing process, please let me know by logging a report in GitHub.
Look forward to your feedback.