textproc/py-qrcode: Update to 7.3

Changes since 6.1:

• Add --ascii parameter to command line interface allowing to output ascii when stdout is piped
• Add --output parameter to command line interface to specify output file
• Accept RGB tuples in fill_color and back_color
• Add to_string method to SVG images
• Replace inline styles with SVG attributes to avoid CSP issues
• Add Styled PIL image factory, allowing different color masks and shapes in QR codes
• Small performance inprovement
• Add check for border size parameter
• Skip color mask if QR is black and white

Reported by: portscout