Update to Minecraft 1.13.1

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

paper-api/src/main/java/org/bukkit/block/data/type/TNT.java

@@ -0,0 +1,23 @@
+package org.bukkit.block.data.type;
+
+import org.bukkit.block.data.BlockData;
+
+/**
+ * 'unstable' indicates whether this TNT will explode on punching.
+ */
+public interface TNT extends BlockData {
+
+    /**
+     * Gets the value of the 'unstable' property.
+     *
+     * @return the 'unstable' value
+     */
+    boolean isUnstable();
+
+    /**
+     * Sets the value of the 'unstable' property.
+     *
+     * @param unstable the new 'unstable' value
+     */
+    void setUnstable(boolean unstable);
+}