Issue Description: On 1.18, the biome colormap doesn't seen accurate. Not sure if you're aware of this and you just haven't reached this stage of porting the plugin to 1.18 yet, but I thought I would make an issue just in case.

• Dynmap Version: 3.3-SNAPSHOT downloaded at around 2021-12-02 10:00 UTC (updated to latest version now, waiting for re-render)
• Server Version: Paper 1.18

it does seem fixed in the latest build today, nevermind