SvAddressProvider never provides an apartment number

[rweisleder]

The SvAddressProvider always provides an empty string as apartment number: https://github.com/Devskiller/jfairy/blob/f4c6a92db82c0ec5d1d5a24fe62df542f492e744/src/main/java/com/devskiller/jfairy/producer/person/locale/sv/SvAddressProvider.java#L16-L19

baseProducer.randomInt(20) returns an int between 0 and 20 (both inclusive), so it will be never less than 0.