Mostly fixed 1.17->1.16 inventory desync issues (thanks to Quantum64)
Issues won't 100% be gone, but this is likely as far as it will ever go. You can follow the status on two potential candidates here
Fixed 1.17/1.18->1.15 biome handling, added biome-mappings.json for custom biomes
Fixed long scoreboard objective names in 1.18->1.17
Fixed bad sending of block entities below y 0/above y 255 in 1.17->1.16
Fixed smoke directions in 1.13.1->1.13 (by WinX64)
Fixed Velocity and Sponge config locations. If you are updating from an older version, please move the ViaBackwards config from `<plugin folder>/ViaBackwards/config.yml/config.yml` to `<plugin folder>/ViaBackwards/config.yml`