Support for 7-digit postal codes in Egypt

[faustbrian]

The new Egypt Postal code system depends on assigning 7 digit postal code number to every block of buildings, which assure better accuracy of identifying the postal code.

https://epostalmap.com/en/

[BenMorel]

Hi @faustbrian, thanks for your PR!

The site you linked to is not an official website, and I'm having trouble finding information about 7-digit postcodes.
I tried the Egypt Post website, but this page doesn't work for me:

https://egyptpost.gov.eg/ar-eg/home/eservices/find-postal-code/

Do you have an official source of information?

[faustbrian]

@BenMorel I don't really have any official sources. The closest would probably be https://www.upu.int/UPU/media/upu/PostalEntitiesFiles/addressingUnit/egyEn.pdf but that's not official from a government.

We started to notice this because we use this package in a logistics product and customers recently started to use 7 digit postal codes for Egypt consignments instead of 5 digit postal codes, so currently we have a workaround that if validation fails for 5 digits we check for 7 digits and that works. All the third-party vendors we integrate also started to recognize 7 digit postal codes for Egypt.

[BenMorel]

Thank you, the upu.int source looks good to me. Can you please change this sentence in the class docblock:

Postcodes consist of 5 digits, without separator.

Postcodes consist of 5 or 7 digits, without separator.

and add a link to the PDF above in the docblock as well?

[faustbrian]

@BenMorel done

[BenMorel]

Thank you, @faustbrian!

[BenMorel]

Released as 0.3.2.