Issue Description

Setting and publishing the price for a variant does not take effect.

No errors are reported. This is different than #91
Viewing the product in a storefront will also show the product without a price.

Steps to Reproduce

Please provide starting context, i.e. logged in as a user, configure a particular payment method.

1. Create a new variant.
2. Add a price to it
3. Refresh to see that the price is reset to zero.

Possible Solution

Not obligatory, but suggest a fix/reason for the bug

Versions

release-3.0.0