Update a game from an URL in pdxinfo

[AdamsImmersive (Morgan)]

Auto-updating in some way would be great! FWIW, here's the best method I've come up with as it now stands:

Here's a dead-simple QR-code based update-checking system for itch.io and sideloaded games

Use this freely if it helps you! Fixes/improvements welcome. There are lots of ways this could be made more sophisticated, but I wanted something super simple to implement with just a few lines of code—while being as friendly as possible to the end user. Here's how it works 1. The Playdate game reads its build number from the pdxinfo file and makes a URL with that number as a parameter. This is presented as a QR code to scan with a phone. That's how the user checks for updates. (The QR code ta…