Improved drawer child lock

Simple drawer lock designed to keep very curious little people out. Designed for an IKEA MALM chest of drawers, but it will likely fit other drawers with wood-based side walls (although if you're feeling adventurous and try to use this on a metal drawer, I'd be happy to hear about this).

Even though I've installed drawer locks (ikea patrull and [my clone](https://www.thingiverse.com/thing:3510507)) in the clothes drawers, my 2yo still manages to make a mess by pulling out clothes through the