[has-pseudo] release major version

[romainmenke]

• [has-pseudo] experimental -> stable #459
• [has-pseudo] remove old CDN urls #442
• [has-pseudo] add browser tests #445
• [has-pseudo] check spec compliance #447
• [has-pseudo] housekeeping #451
• migration docs

[sntran]

Hello,

It looks like all the checkboxes are checked. Is there any blocker preventing a new release for css-has-pseudo?

[Antonio-Laguna]

@sntran there is not! Probably will happen next week

[Antonio-Laguna]

This can now be closed as this has been released!