Update to Minecraft 1.9

By: md_5 <git@md-5.net>

paper-server/src/test/java/org/bukkit/BiomeTest.java

@@ -0,0 +1,24 @@
+package org.bukkit;
+
+import net.minecraft.server.BiomeBase;
+import org.bukkit.block.Biome;
+import org.bukkit.craftbukkit.block.CraftBlock;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class BiomeTest {
+
+    @Test
+    public void testBukkitToMinecraft() {
+        for (Biome biome : Biome.values()) {
+            Assert.assertNotNull("No NMS mapping for " + biome, CraftBlock.biomeToBiomeBase(biome));
+        }
+    }
+
+    @Test
+    public void testMinecraftToBukkit() {
+        for (BiomeBase biome : BiomeBase.REGISTRY_ID) {
+            Assert.assertNotNull("No Bukkit mapping for " + biome, CraftBlock.biomeBaseToBiome(biome));
+        }
+    }
+}