v0.5.3

Enhancements:

• Added plugin option that turns off the plugin's ability to strip width/height attributes from <img> elems (enabled by default for backward compatibility)
• Added absolute file includes in main plugin file
• Upgraded packages

Bug Fixes:

• Fixed issue with default plugin options not applying correctly
• Added fix for images within <figure> elems in IE11
• Fixed notices with PHP 7.4+