Support for even more local currencies when paying for Mullvad

In order to avoid fees when paying with Stripe (credit cards) and Paypal we now support the following currencies:

Stripe: EUR, USD, GBP, SEK, AUD, BRL, CAD, CHF, DKK, HKD, JPY, KRW, NOK, PLN, SGD, UAH

Paypal: EUR, USD, GBP, SEK, AUD, BRL, CAD, CHF, DKK, HKD, JPY, NOK, PLN, SGD

The price is always the equivalent of €5, exchange rates convert from the base price of €5.