Bump 'chillerlan/php-qrcode' to 5.0.x.

* Maintains PHP `7.4` compatibility and adds PHP `8.4` compatibility
  * The `4.4.x` branch does the same, but I didn't see any reason not to go to `5.0.x`.
* https://github.com/chillerlan/php-qrcode/releases

composer.json

@@ -22,7 +22,7 @@
 	},
 	"require": {
 		"spomky-labs/otphp": "^10.0",
-		"chillerlan/php-qrcode": "^4.3.3",
+		"chillerlan/php-qrcode": "^5.0.3",
 		"mervick/material-design-icons": "^2.2",
 		"j4mie/idiorm": "dev-master",
 		"soundasleep/html2text": "^2.1",