Gravity Perks - QR Code 1.0.13

Updated the scanner library.
Fixed issue where scanning into a Paragraph field did not correctly insert the value into the field.

Added support for displaying scanner button when enabled for Paragraph fields.

Updated the default QR code error correction from low (7%) to medium (15%) to improve reliability of the generated codes when scanned.
Added the ability to change QR code error correction level using the gpqr_params_pre_generate hook. Accepted values are l (7%), m (15%), q (25%), and h (30%).