fix: Handle synchronous exit events

Author: mgagliardo91

lib/distributed-lock.js

@@ -40,7 +40,14 @@ const onExit = callbackify(async () => {
 });
 
 // Attempt to release any held locks if we are accidentally killed
-exitHook(onExit);
+exitHook((done) => {
+  if (!done) {
+    log('Skipping lock cleanup due to synchronous exit.');
+    return;
+  }
+
+  return onExit(done);
+});
 
 class DistributedLock {
   constructor(lockName, params) {