WooCommerce 3.9.1 Fix Update

WooCommerce released a smal fix update on January 28. It contains 5 fixes.

• Prevent empty notices to get displayed on frontend.
• Show «-» instead of «0» when tax isn’t applicable to a product.
• Fixed fatal error on the thank you page if order is not specified.
• Trim whitespaces and strip slashes from MaxMind License Key have been added.
• Product and variations schema to allow remove sale prices, dimensions and weight was fixed.

Remember to create a backup before installing updates.