Fix async usage after update

- change package dir
- replace broken kill patch with remove filter

gulpfile.js

@@ -50,7 +50,7 @@ var paths = {
         ]),
     scripts: [
         'node_modules/jquery/dist/jquery.js',
-        'node_modules/async/lib/async.js',
+        'node_modules/async/dist/async.js',
         'node_modules/leaflet/dist/leaflet-src.js',
     ]
         .concat(

js/index.js

@@ -213,7 +213,10 @@
 
             // abort pending requests from previous rerouteAllSegments
             if (!router.queue.idle()) {
-                router.queue.kill();
+                router.queue.remove((task) => {
+                    task.callback(L.BRouter.ABORTED_ERROR);
+                    return true;
+                });
             }
             routing.rerouteAllSegments(onUpdate);
         }

js/router/BRouter.js

@@ -26,16 +26,6 @@ L.BRouter = L.Class.extend({
             }, this),
             1
         );
-
-        // patch to call callbacks on kill for cleanup (loadingTrailer)
-        this.queue.kill = function () {
-            var aborted = this.tasks;
-            this.drain = null;
-            this.tasks = [];
-            aborted.forEach(function (task) {
-                task.callback(L.BRouter.ABORTED_ERROR);
-            });
-        };
     },
 
     setOptions: function (options) {