Media Credit 4.1.0

• Feature: Images cropped in the Customizer inherit the credit from the original image.
• Feature: Credits are read from EXIF/IPTC fields on image upload.
• Bugfix: No markup is added to core/image blocks when no credit is set.
• Bugfix: Attachment details input fields are set to read-only when the user
  lacks write permissions for the image.
• Bugfix: Malformed shortcodes won't break the editor anymore.
• Bugfix: Some error messages were not getting translated because of a
  WP.org infrastructure change.
• Change: All external PHP dependencies have been moved to the namespace
  Media_Credit\Vendor to reduce the chance of conflicts with other plugins.