Yoast WooCommerce SEO Premium 16.2

Fixes a bug where the twitter:image meta tag would not fall back on the first product gallery image when no main product image was set.
Fixes a bug where all product gallery images would be output as og:image even though a user had set a specific image for a product.

Bugfixes:

• Fixes a bug where thumbnail product gallery images were added to the XML product sitemap instead of full size images.

Enhancements:

• Adds a Term hierarchy snippet variable.
• Unifies the OpenGraph description fallbacks as per Overview | Yoast Developer portal.

Other:

• Compatibility with Yoast SEO 14.0.
• Sets the minimum supported Yoast SEO version to 14.0.
• Sets the minimum supported WordPress version to 5.3.

Bugfixes:
Fixes a bug where PHP notices and a PHP warning were thrown for Product schema without a price.
Fixes a bug where the priceValidUntil schema property wasn’t output for products on sale with an explicitly set sale end date.

Enhancements:
Improves the Open Graph product availability for better compatibility with Facebook and Pinterest.
Adds the product identifiers (GTIN, ISBN etc.) to the SEO title and Meta description replacement variables.
Adds a color attribute to the Product Schema output.