Tracking info regex for USPS should detect 1 or 2 digit day of month


For tracking events that occur before the 10th of the month, USPS API returns a 1 digit day. 

For instance tracking code: 9405510200883906925426
Will return "Your item was delivered at 12:58 pm on September 9, 2013 in EASTHAMPTON, MA 01027"