Fix Correios services' codes changes

Correios has changed its services codes. This version fix it with the new codes.

Allow working with numbers above thousand

v1.0.1

Allow working with numbers above thousand

Version released for production use

v1.0.0

first version for production use

Version released for testing

v1.0.0.beta

version released for testing!!!!

Starting the first tests

Attention! It is strongly advised not to use this version in production