Use 1.16.1 spigot API

pom.xml

@@ -58,7 +58,7 @@
         <!-- Non-minecraft related dependencies -->
         <powermock.version>2.0.2</powermock.version>
         <!-- More visible way how to change dependency versions -->
-        <spigot.version>1.15.2-R0.1-SNAPSHOT</spigot.version>
+        <spigot.version>1.16.1-R0.1-SNAPSHOT</spigot.version>
         <bentobox.version>1.14.0-SNAPSHOT</bentobox.version>
         <!-- Revision variable removes warning about dynamic version -->
         <revision>${build.version}-SNAPSHOT</revision>

src/main/java/world/bentobox/bskyblock/generators/ChunkGeneratorWorld.java

@@ -53,6 +53,7 @@ public class ChunkGeneratorWorld extends ChunkGenerator {
         return generateChunks(world);
     }
 
+    @SuppressWarnings("deprecation")
     private void setBiome(BiomeGrid biomeGrid) {
         Biome biome = addon.getSettings().getDefaultBiome();
         for (int x = 0; x < 16; x++) {