France regions (getState()) returns deprecated ISO 3166-2 codes

[ksxentral]

The data for france regions was valid until 2015 and looked like this:
Elsass (Alsace) | (FR-A)

with a total of 22 regions.

2016 there was a change to three letter codes and only 13 regions like this:
Auvergne-Rhône-Alpes | FR-ARA

[see https://de.wikipedia.org/wiki/ISO_3166-2:FR]

[dusterio]

Would you be up to make a PR with updated codes? :)

[ksxentral]

Yes of course. How to deal with backward compatibility if people using this package have written data to their databases to identify french regions and iso codes?