Fix Image-Related Issues

• Addresses sizing issues for images under 1200px in width.
• Ensures that OG images are never generated with relative URLs.
• Requires that selected images be at least 200px x 200px.

Fix `og:type` Tag Generation, Use Author Avatar If Available

This release fixes a bug causing the og:type tag from not being generated on any page. Additionally, if on an author archive page and a user avatar is available, use that for the Open Graph image tags.

Improve Backwards Compatibility w/ Old PHP Versions

While the plugin officially supports PHP 5.6 and above, I usually don't mind making the plugin more backwards compatible with a little bit earlier than that. That's what this release does, addressing issues with array_filter():

http://php.net/manual/en/function.array-filter.php#refsect1-function.array-filter-changelog

Fix Constant-Related Bug for Older PHP Users

For users on older versions of PHP, a constant-related bug was causing the plugin to fail. This address that issue.

On a related note, if you're running anything under PHP 7.1, light a fire under your butt and update!

Improve Code Organization, Show Profile Meta Tags on Author Pages

This release improves code organization & test coverage, and also generates profile meta fields tags when on a dedicated author page.

Improve Image Meta Tag Logic & Efficiency

This release improves the logic that's used to determine how OG image tags are generated, as well as improve the efficiency of that logic.

Improve PHP Backwards Compatibility, Add maybe_enable Filter

This release addresses some bugs being caused by earlier versions of PHP, as well as introduces a filter enabling developers to disable OG tag generation when they desire.

Add Basic Unit Testing, Improve Default Value Handling

This release adds a basic framework for unit testing and improves how the plugin handles default values when those values are empty.

Fix Incorrect Class Property Reference

In the previous release, there was an incorrect reference to a class property, which was causing a PHP notice. This release fixes that.

Fix Bug Causing Errors when Invalid Attachment ID Passed

Also, the version of the plugin is now attached to admin assets to prevent caching issues when new versions are available.