Add countryCode option to the address generator

[Gejsi]

Currently, it is possible to generate phone numbers based on a specific country format:

// This will generate only french numbers.
randPhoneNumber({ countryCode: 'FR' })

I haven't dug deep inside the source code, but could countryCode be added to the address generator?

// This will generate only french-related data.
randAddress({ countryCode: 'FR' })

[NetanelBasal]

Sure, we'd love to see a PR.

[Gejsi]

After taking a look at the source code, the approach I would take is to change every JSON file related to the functions used inside randAddress(). This means changing, for example, the data used by randStreetName() as it is already been done for the phone number generator.
Current data format:

"data": [
    "King Drives",
]

New data format:

"data": [
   {
      "streets": ["King Drives"],
      "countryCode": ["CA"]
    }
]

Same thing applies for the data needed by randCity() and roundCounty().
Even the zip code generator should be changed to return random values within the range numbers imposed by countries.

All these changes will require a lot of time, new data, and code refactoring.
Also, the overall size of the library will surely increase if this PR is developed.

In conclusion: I think this feature shouldn't be added since it solves a niche problem.