Add France oversea department phone codes

[kbouzidi]

France has five administered territories outside the European continent. These territories have specific phone code but still can be assimilated to France number.
Guadeloupe->fr-GP->PhoneCode (590)
French Guiana->fr-GF->PhoneCode (594)
Martinique ->fr-MQ->PhoneCode (596)
Réunion ->fr-RE->PhoneCode (262)
Mayotte ->fr-YT->PhoneCode (262)

PS. As you may notice, reunion and Mayotte have the same Phone code, I choose to add only Réunion to avoid code duplication

[chriso]

Thanks. Do you mind updating the source file and README?

[profnandaa]

@kbouzidi - as for fr-RE and fr-YT, you could add fr-YT as an alias after the other aliases here:

https://github.com/chriso/validator.js/blob/master/src/lib/isMobilePhone.js#L74-L76

phones['fr-YT'] = phones['fr-RE'];

Then add the tests and update the README as advised.

Let me know if you need any help 👍

[profnandaa]

Ping @kbouzidi

[profnandaa]

closed in #1060