Gutenberg Editor In the Custom Post Types

[robmcclel]

Is your feature request related to a problem? Please describe.
I'd like to have an easier way to include different content into the book description area (audio samples, galleries, reader reviews/testimonials, etc) and feel that the many new Gutenberg block options for these things would be much easier than the traditional "classic" methods.

Describe the solution you'd like
I'd like to know a way to enable the Gutenberg editor in the Author Pro Custom Post Type.

Describe alternatives you've considered
I've consulted a few methods on the web on how to activate the Gutenberg editor for custom post types, but their method/description doesn't seem to match how the custom post type in the plugin is constructed. Here is what I found as a sample:

/*Register WordPress Gutenberg CPT */ function cw_post_type() { register_post_type( 'portfolio', // WordPress CPT Options Start array( 'labels' => array( 'name' => __( 'Portfolio' ), 'singular_name' => __( 'Portfolio' ) ), 'has_archive' => true, 'public' => true, 'rewrite' => array('slug' => 'portfolio'), 'show_in_rest' => true, 'supports' => array('editor') ) ); }

This snippet is supposed to go into the theme's functions .php file, but considering Author Pro is a plugin, I wasn't sure where would be the best place to insert it. Also, if the full insertion is necessary. The key for activating the Gutenberg editor screen is this smaller part:

'show_in_rest' => true, 'supports' => array('editor')

I would appreciate it if the plugin designer could provide some insight into how they would enable the Gutenberg editor into the various parts of this plugin (book, library page, series page, author page, tag page, etc). My clients have been wanting to put a lot more content into these areas than basic text, and Gutenberg capability would significantly decrease the level of effort to do so.

Thank you and any assistance is much appreciated.