add setImmediate() shim via set-immediate-shim module

Author: vdemedes

Diff for: index.js

@@ -1,4 +1,5 @@
 'use strict';
+var setImmediate = require('set-immediate-shim');
 var prettyMs = require('pretty-ms');
 var chalk = require('chalk');
 var figures = require('figures');

Diff for: lib/test.js

@@ -1,4 +1,5 @@
 'use strict';
+var setImmediate = require('set-immediate-shim');
 var util = require('util');
 var assert = require('assert');
 var EventEmitter = require('events').EventEmitter;

Diff for: package.json

@@ -55,6 +55,7 @@
     "meow": "^3.3.0",
     "plur": "^2.0.0",
     "pretty-ms": "^2.0.0",
+    "set-immediate-shim": "^1.0.1",
     "squeak": "^1.2.0",
     "update-notifier": "^0.5.0"
   },