* Fix: Markup warning for sameAs property.
* Fix: PHP notice in author extension and setup wizard.
* Fix: PHP notice when calling comments markup function.
* Fix: PHP notice when post id is not set on some edit screens.
* Fix: Exclusion rules for post ID, and post categories.
* Fix: General tab key and id was misspelled.
* Fix: Error due to conflict function name, changed to sp_is_edit_page.
* Fix: Warnings in VideoObject extension, added contentUrl and embedUrl properties.
* Fix: Duplicate markup when checking post categories.
* Enhancement: Added support for schema.org Thing.
* Enhancement: Added support for schema.org CreativeWork.
* Enhancement: Added support for schema.org Organization.
* Enhancement: Added support for schema.org Book, and its subtype Audiobook.
* Enhancement: Added support for SocialMediaPosting subtypes.
* Enhancement: Added new options page for creating schema types.
* Enhancement: Added new integration for WP Job Manager plugin.
* Enhancement: Added new function to return supported schema.org types.
* Enhancement: Added new function to return an array of available countries.
* Enhancement: Added new function to retrieve attachment url from id.
* Enhancement: Added new function to get address markup.
* Enhancement: Added new function to subtract words by a number of characters.
* Enhancement: Added new function to force remove shortcodes from description.
* Enhancement: Added new feature to fix local server urls when testing.
* Enhancement: Added new filter schema_location_rules.
* Enhancement: Added new filter schema_add_to_properties.
* Enhancement: Added new filter schema_post_type_archive_enable.
* Enhancement: Added link to Schema post type in edit screen.
* Enhancement: Added dashicon and conditional_logic parameters to property tabs.
* Enhancement: Added discussionUrl property.
* Enhancement: Added missing translations and instructions for VideoObject extension.
* Enhancement: Added links for specific posts and pages in schema columns page.
* Enhancement: Do not store schema type comment in post meta.
* Enhancement: Allow disabling Price Range property field.
* Enhancement: Moved BlogPosting file under SocialMediaPosting sub folder.
* Enhancement: Switched all @context urls to https.
* Enhancement: Switched gravatar urls to https.
* Enhancement: Schema types properties has its own function for ACF fields.
* Enhancement: Make sure Thing and CreativeWork classes loads earlier.
* Enhancement: Allow priceRange example $10-20 in fixed values and post meta.
* Enhancement: Speed up queries in back-end when getting all post meta keys.
* Enhancement: Re-order settings admin menu item.
* Enhancement: Reduced code base by making use of reusable functions.
* Enhancement: Modified some wording in back-end to make it more informational.
* Update: Updated ACF Pro to version 5.9.1 release.
* Update: Pumped tested WordPress version to 5.5.1 release.