ES6-ify codebase (#1553)

* cancelable foreach

* cancelable waterfall

* cancellable auto

* fix lint

* fix tests

* cancelable whilst/until/during/forever

* fix waterfall test.  It WILL get there

* docs

* use rest params instead of slice

* clean up internals

* remove property func

* clarify uses of createTester

* happy path async funtions in asyncify

* stop using arguments

* DLL to class

* moar arrows

* fix merge issues

* remove forOwn

* moar arrows

* fix merge mistake

* even more arrows, what can stop him

* mo more fn.apply(null,...)

* remove more spurious uses of apply

* update lint config

* just when you thought there couldn't possibly be more arrows

* use eslint:recommended

* even less uses or aguments

* get rid of prototype cuteness

* fix concat tests

* fix more tests

1 files changed, 6 insertions, 6 deletions

diff --git a/test/setImmediate.js b/test/setImmediate.js
index 854111a..6e4a400 100644
--- a/test/setImmediate.js
+++ b/test/setImmediate.js
@@ -1,21 +1,21 @@
 var async = require('../lib');
 var expect = require('chai').expect;
 
-describe("setImmediate", function () {
+describe("setImmediate", () => {
 
-    it('basics', function(done){
+    it('basics', (done) => {
         var call_order = [];
-        async.setImmediate(function(){call_order.push('two');});
+        async.setImmediate(() => {call_order.push('two');});
         call_order.push('one');
 
-        setTimeout(function(){
+        setTimeout(() => {
             expect(call_order).to.eql(['one','two']);
             done();
         }, 25);
     });
 
-    it("extra args", function (done) {
-        async.setImmediate(function (a, b, c) {
+    it("extra args", (done) => {
+        async.setImmediate((a, b, c) => {
             expect([a, b, c]).to.eql([1, 2, 3]);
             done();
         }, 1, 2, 3);