fix(input): fix the email regex to accept TLDs up to 6 characters long

The input field email regex does't not match long domain extensions. This commit extends the email regexp to take a 6 character TLD.

Example 6-character TLDs include .museum and .travel - (e.g. allabout.travel).

src/ng/directive/input.js

@@ -1,7 +1,7 @@
 'use strict';
 
 var URL_REGEXP = /^(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?$/;
-var EMAIL_REGEXP = /^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/;
+var EMAIL_REGEXP = /^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}$/;
 var NUMBER_REGEXP = /^\s*(\-|\+)?(\d+|(\d*(\.\d*)))\s*$/;
 
 var inputType = {

test/ng/directive/inputSpec.js

@@ -748,6 +748,7 @@ describe('input', function() {
 
       it('should validate email', function() {
         expect(EMAIL_REGEXP.test('a@b.com')).toBe(true);
+        expect(EMAIL_REGEXP.test('a@b.museum')).toBe(true);
         expect(EMAIL_REGEXP.test('a@B.c')).toBe(false);
       });
     });