Note: I've tested this as much as I can and it's been working fine for me on several installations, but I would still recommend trying this out on a staging site first, or at the very least make a backup before trying to upgrade. The changes to "image" columns were quite intricate but hopefully I didnt miss anything.
Complete changelog
Fix issue where "Change profile blocks" permission set to never would not hide the relevant user(groups) already-created blocks
Clean up Javascript
Fix compatibility with Content Blur Pro
Stop applying user styles in the admin panel's "Staff online" widget
Fix issue where profile settings could not be saved due to "page_bg" triggering a false positive for an invalid color
Allow more than just image URLs to be used for profile page header, profile navbar, and profile page background
Create "Disallowed hosts for external images" admin option
Allow a user to export/import their user style settings as a JSON file
Add "cursor" to list of "Whitelisted CSS properties" admin option
Allow choosing a solid color for postbit backgrounds
Allow uploading images for inner-text animations instead of requiring a URL
Create admin options for setting format & image quality of user-uploaded images (backgrounds, icons etc)
Remove member profile name's text-stroke workaround
Remove inner-text animations from Post Styles due to performance issues on large posts, and incompatibility with new implementation of inner-text animations
Fix longstanding incompatibility between inner-text animations/color gradients & glows
Fix issue where profile settings could not be saved due to "page_bg" triggering a false positive for an invalid color
Allow more than just image URLs to be used for profile page header, profile navbar, and profile page background
Create "Disallowed hosts for external images" admin option
Allow a user to export/import their user style settings as a JSON file
Add "cursor" to list of "Whitelisted CSS properties" admin option
Allow choosing a solid color for postbit backgrounds
Allow uploading images for inner-text animations instead of requiring a URL
Create admin options for setting format & image quality of user-uploaded images (backgrounds, icons etc)
Remove member profile name's text-stroke workaround
Remove inner-text animations from Post Styles due to performance issues on large posts, and incompatibility with new implementation of inner-text animations
Fix longstanding incompatibility between inner-text animations/color gradients & glows