update FoliaLib & add CancellableRunnable

pom.xml

@@ -383,7 +383,7 @@
         <dependency>
             <groupId>com.tcoded</groupId>
             <artifactId>FoliaLib</artifactId>
-            <version>0.2.5</version>
+            <version>0.3.0</version>
             <scope>compile</scope>
         </dependency>
     </dependencies>

src/main/java/com/gmail/nossr50/util/CancellableRunnable.java

@@ -0,0 +1,28 @@
+package com.gmail.nossr50.util;
+
+import com.tcoded.folialib.wrapper.task.WrappedTask;
+
+import java.util.function.Consumer;
+
+public abstract class CancellableRunnable implements Consumer<WrappedTask> {
+    private boolean cancelled = false;
+
+    public void cancel() {
+        cancelled = true;
+    }
+
+    public abstract void run();
+
+    @Override
+    public void accept(WrappedTask wrappedTask) {
+        // Run the task if it hasn't been cancelled
+        if (!cancelled) {
+            run();
+        }
+
+        // Cancel the task if it has been cancelled after running
+        if (cancelled) {
+            wrappedTask.cancel();
+        }
+    }
+}