Enhancements

• Added cmb2_tab_group_tabs filter for adding arbitrary menu page urls to the cmb2 tabs, and move tab markup output to separate method, CMB2_Options_Hookup::options_page_tab_nav_output(). Fixes #1407.
• Limit use of italic, including removing from field descriptions. Fixes #1404.
• Add to list of valid image types from get_allowed_mime_types(), which makes SVGs more reliable when using the Safe SVG plugin. Fixes #1223.

Bug Fixes

• Fixes PHP warnings on repeatable ColorPicker with an array as default. Props @rubengc (#1340).
• Address PHP 7.4, compatibility issues with func_get_args(). Fixes #1389.
• Better generated array key for cached fields, fixes issue where wrong field is found. Fixes #14053.
• Fix issue with options-pages being changed to register on a hook priority of 5 instead of the default 10, causing some back-compatibility issues. Fixes #1410.