Fix incorrect method spelling

lib/crawlerService.js

@@ -119,7 +119,7 @@ class CrawlerService {
   requeueDeadletter(url, queue) {
     return this.getDeadletter(url)
       .then(document => {
-        const request = Request.adopt(document).createRequeable();
+        const request = Request.adopt(document).createRequeuable();
         request.attemptCount = 0;
         return this.crawler.queues.push([request], queue)
       })