Add setBiome override in MaskingExtent.

This makes biome operations respect masks set on an EditSession.

Author: wizjany

worldedit-core/src/main/java/com/sk89q/worldedit/extent/MaskingExtent.java

@@ -110,6 +110,11 @@ public <B extends BlockStateHolder<B>> boolean setBlock(BlockVector3 location, B
         return this.mask.test(location) && super.setBlock(location, block);
     }
 
+    @Override
+    public boolean setBiome(BlockVector3 location, BiomeType biome) {
+        return mask.test(location) && super.setBiome(location, biome);
+    }
+
     @Override
     public boolean setBiome(int x, int y, int z, BiomeType biome) {
         return this.mask.test(BlockVector3.at(x, y, z)) && super.setBiome(x, y, z, biome);