Update README.md

Author: daredloco

README.md

@@ -50,4 +50,5 @@ The $response object contains the following variables:
 - $country => The country of the address (In case of CepAberto its always Brazil)
 - $longitude => The longitude of the address (Can be null!)
 - $latitude => The latitude of the address (Can be null!)
-- $altitude => The altitude of the address (Can be null!)
+- $altitude => The altitude of the address (Can be null!)
+4. If environment variables dont work, try publish the configuration file, this will probably be patched in the future.