Don't return Promise when it isn't used anyway

src/stream.js

@@ -5,13 +5,14 @@ const through2 = require("through2");
 const assureArray = require("assure-array");
 
 function wrapStreamHandler(stream, handler, callback, item) {
-	return Promise.try(() => {
+	Promise.try(() => {
 		return handler(item);
 	}).then((result) => {
 		return assureArray(result);
 	}).each((newItem) => {
 		stream.push(newItem);
 	}).then(() => {
+		// TODO: Fix the "a promise was created in a handler at [...] but was not returned from it" Bluebird warning that occurs here
 		callback();
 	}).catch((err) => {
 		callback(err);