Fix more stupid mistakes

lib/index.js

@@ -40,19 +40,19 @@ function addWatchTask(taker, name, description) {
   // Define the watch function.
   let watch = () => {
     for (let watchableName of watchables) {
-
       const watchableTask = taker.task(watchableName);
       taker.watch(watchableTask.unwrap()._watch, watchableTask);
     }
+    return Promise.resolve();
   };
   // Push an initial run of each watchable task onto the beginning.
   if (watchables.length > 0) {
     watch = taker.series(taker.parallel(watchables), watch);
   }
-  task.displayName = name;
-  task.description = description;
+  watch.displayName = name;
+  watch.description = description;
 
-  taker.task(name, task);
+  taker.task(name, watch);
 }