Merge pull request Pikaday#272 from Huntedpix/master

Update pikaday.js to fix accessibility/utilisability issue

Author: rikkert

pikaday.js

@@ -466,7 +466,9 @@
             else {
                 date = new Date(Date.parse(opts.field.value));
             }
-            self.setDate(isDate(date) ? date : null);
+            if (isDate(date)) {
+              self.setDate(date)
+            }
             if (!self._v) {
                 self.show();
             }