Ninja Forms - File Uploads Addon 3.3.20

*New:*
* Setting to make the URLs to files upload to external service providers accessible to non-logged in users

*Changes:*
* Updated jQuery File Upload library to v10.30.1.

*Bugs:*
* Fix Google Drive file preview URL not working
* Fix cancel button doesn't show to allow clearing upload errors
* Fix files with non UTF8 characters not reloaded when using the Save Progress addon

*Bugs:*
* Fix mergetags variations not rendering the correct value
* Fix external file url redirecting to site admin home if the service is no longer connected

*New:*

* Button to cancel a file upload, or clear an error after a failed upload

*Bugs:*

* File upload links being stripped from emails and success messages
* Fatal error when uploading multiple files to Google Drive and renaming the file names
* Required field validation error shows when the 'Select Files' button clicked
* Missing file upload when submitting a form that had previously been saved with the Save Progress addon
* Multiple file upload URLs appearing as one large broken link in emails
* PHP notices about mergetag values when saving a form
* Browse uploads table losing form filter when paginating or sorting