Update tested environments. [ci skip]

jdalton · jdalton · commit d051707591bf · 2016-12-24T09:52:00.000-06:00
diff --git a/README.md b/README.md
@@ -84,7 +84,7 @@ suite.add('RegExp#test', function() {
 
 ## Support
 
-Tested in Chrome 53-54, Firefox 48-49, IE 11, Edge 14, Safari 9-10, Node.js 6-7, & PhantomJS 2.1.1.
+Tested in Chrome 54-55, Firefox 49-50, IE 11, Edge 14, Safari 9-10, Node.js 6-7, & PhantomJS 2.1.1.
 
 ## BestieJS
 
