py-stdnum: updated to 1.19

changes from 1.18 to 1.19
-------------------------

* Add modules for the following number formats:

  - Tax Registration Number (الرقم الضريبي, Egypt tax number) (thanks Leandro Regueiro)
  - Postcode (the Spanish postal code) (thanks Víctor)
  - NIFp (Numéro d'Identification Fiscale Permanent, Guinea tax number)
    (thanks Leandro Regueiro)
  - BIS (Belgian BIS number) (thanks Jeff Horemans)
  - Matična številka poslovnega registra (Corporate Registration Number) (thanks Blaž Bregar)
  - OSS (European VAT on e-Commerce - One Stop Shop) (thanks Sergi Almacellas Abellana)

* Extend the validation of the Albanian NIPT (NUIS) number (thanks Julien Launois)
* Support different date formats in parsing GS1-128 application identifiers
* Add get_county() function to Romanian CNP (thanks RaduBorzea)
* Add functionality to get gender from Belgian National Number (thanks Jeff Horemans)
* Add support for Finland HETU new century indicating signs (thanks Maks Turtiainen)
* Add functionality to get (partial) birth date from Belgian National Number
  (thanks Jeff Horemans)
* Extend validation of Canadian SIN (thanks Marcel Lecker)
* Fix Belarusian UNP online validation
* Various typo and documentation fixes (thanks valeriko, Dimitri Papadopoulos,
  Ali-Akber Saifee and Chales Horn)
* Add contribution information to documentation
* Test suite improvements (including checking file headers)

(adam)