Support <image:license> in image sitemap

[zitrusblau]

• [x] I've read and understood the contribution guidelines.
• [x] I've searched for any related issues and avoided creating a duplicate issue.

Please give us a description of what happened.

The google sitemap schema (https://www.google.com/schemas/sitemap-image/1.1/sitemap-image.xsd) supports a tag .

Is there any filter or hook that can be used to add this tag to a sitemap? If not, is this feature part of the roadmap?

Thanks in advance.

Please describe what you expected to happen and why.

-/-

How can we reproduce this behavior?

Technical info

• WordPress version: 4.8
• Yoast SEO version: 5.1
• Relevant plugins in case of a bug: -

[thulshof]

Thanks for this feature request. We'll have to discuss this internally. As soon as we've made a decision, you'll be notified in this issue.

[jdevalk]

Let's add a filter here.