Merge pull request #5725 from chrootsu/redlock-unlock

redlock: fixed Lock.unlock() signature

redlock/redlock-test.ts

@@ -86,7 +86,7 @@ module LockTest {
 	{
 		let lock: Lock;
 		let callback: NodeifyCallback<void>;
-		let result: void;
+		let result: Promise<void>;
 		result = lock.unlock();
 		result = lock.unlock(callback);
 	}

redlock/redlock.d.ts

@@ -18,7 +18,7 @@ declare module RedlockTypes {
 		value: any;
 		expiration: number;
 
-		unlock(callback?: NodeifyCallback<void>): void;
+		unlock(callback?: NodeifyCallback<void>): Promise<void>;
 
 		extend(ttl: number, callback?: NodeifyCallback<Lock>): Promise<Lock>;
 	}