• Bump the minimum supported WordPress version to 4.4.
• Extended CPTs no longer contains a plugin header, reinforcing the fact this is a developer library.
• Allow the options parameter of the admin filters to be an associative array of values and their labels.
• Update the rewrite rule tests to work in WordPress 4.4.
• Remove the functionality which adds post type archives to nav menus as this is natively supported in WordPress 4.4.
• Implement a workaround for WordPress core bug #35089.