Correct VAT and postal code for Campione d'Italia

[spaze]

After checking the changes in #137 I've noticed that Campione d'Italia became part of the EU customs territory on 1 Jan 2020.

That means two relevant changes:

• VAT will apply, but the tax rate will remain that of Switzerland:

  • https://en.wikipedia.org/w/index.php?title=Campione_d%27Italia&diff=prev&oldid=937493207
  • https://www.europeansources.info/record/directive-eu-2019-475-amending-directives-2006-112-ec-and-2008-118-ec-as-regards-the-inclusion-of-the-italian-municipality-of-campione-ditalia-and-the-italian-waters-of-lake-lugano-in-the-c/
  • https://www.euronews.com/2020/01/03/tiny-italian-enclave-in-switzerland-transferred-back-to-italy-and-the-eu-s-customs-union
    Unfortunately, this package doesn't support high/low rates for exceptions, so I put just the higher one, like in the other exceptions.

• The Swiss postal code ceased to be valid:

Until 2020, mail could be sent to Campione using either a Swiss postal code (CH-6911) or an Italian one (I-22061) via Switzerland or Italy, but the Swiss postal code ceased to be valid, with mail instead being charged at the same international rate as that between Switzerland and Italy.
https://en.wikipedia.org/w/index.php?title=Campione_d%27Italia&diff=prev&oldid=957716786

[driesvints]

Thank you @spaze

[driesvints]

@spaze just noticed this PR. This was sent to main but probably should go to 3.x?

[spaze]

@driesvints Possibly, yeah. Can't remember why it's for main though 😇

[driesvints]

@spaze ok, feel free to send it to 3.x if you feel it should go in the current release 👍

[spaze]

@driesvints Wanted to create a new PR as this one's been merged already but my fork has diverged way too much already and I'm a bit lost in how to file a new PR against your 3.x branch. Do you think you could try merging main into 3.x? I see there are just a few commits besides this one so it shouldn't create many conflicts. If that doesn't work I'll try to think about something 😅 Thanks!

[driesvints]

@spaze I'll give it a go soon!

[spaze]

Hey @driesvints, I've learned a new trick or two how to sync my fork (had to first switch to the 3.x branch of my fork and then hit the GitHub "Sync fork" button, previously tried that on master which didn't work) and have created #168 by just reapplying the 138.patch to the 3.x branch.

[driesvints]

Cool thanks!