Update to Minecraft 1.20

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

paper-api/src/main/java/org/bukkit/block/BrushableBlock.java

@@ -0,0 +1,28 @@
+package org.bukkit.block;
+
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.loot.Lootable;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Represents a captured state of suspicious sand or gravel.
+ */
+public interface BrushableBlock extends Lootable, TileState {
+
+    /**
+     * Get the item which will be revealed when the sand is fully brushed away
+     * and uncovered.
+     *
+     * @return the item
+     */
+    @Nullable
+    public ItemStack getItem();
+
+    /**
+     * Sets the item which will be revealed when the sand is fully brushed away
+     * and uncovered.
+     *
+     * @param item the item
+     */
+    public void setItem(@Nullable ItemStack item);
+}