Merge pull request #2939 from rvagg:regex-dos-no-more

use full-string match to speed up aspnet regex match

src/lib/duration/create.js

@@ -6,7 +6,7 @@ import { cloneWithOffset } from '../units/offset';
 import { createLocal } from '../create/local';
 
 // ASP.NET json date format regex
-var aspNetRegex = /(\-)?(?:(\d*)[. ])?(\d+)\:(\d+)(?:\:(\d+)\.?(\d{3})?)?/;
+var aspNetRegex = /^(\-)?(?:(\d*)[. ])?(\d+)\:(\d+)(?:\:(\d+)\.?(\d{3})?\d*)?$/;
 
 // from http://docs.closure-library.googlecode.com/git/closure_goog_date_date.js.source.html
 // somewhat more in line with 4.4.3.2 2004 spec, but allows decimal anywhere