Postcode is not working

[tib]

Hi,

first of all thanks for this library!

I'd like to report an issue: postcode generation is not returning proper values. I'm using the faker.address.postcode() method in order to generate random postcode, but this is what i get as a result /[A-PR-UWYZ][A-HK-Y]I[0-9][ABEHMNPRVWXY0-9]X [0-9][ABD-HJLN-UW-Z]{2}/

¯_(ツ)_/¯

Best,
Tib