I can't believe I just found this today. I've been using an AutoHotKey script that's been around for a while (and it definitely works) but I was going to have to update the colors search for the new biomes, had to run it against 1.12 because using a newer version of amidst was too slow. Not to mention it ties up your PC while its searching. I'm always in search of very specific biome combinations for building and this really cuts down on the seed search time and makes minecraft a lot more fun.
I REALLY THIS TOOL. Already found a couple nice build worlds in only 2 hours of searching.