Serbia is missing from SEPA countries list

[btrdnch]

Describe the bug
Serbia is missing from the list of SEPA countries

To Reproduce

ibantools@4.5.4

Welcome to Node.js v24.6.0.
Type ".help" for more information.
> const ibantools = require('ibantools')
undefined
> ibantools.isSEPACountry('SRB')
false
> ibantools.isSEPACountry('RS')
false
> 

Expected behavior
True is expected to be returned since Serbia is SEPA country

Environment:

ibantools@4.5.4
Node.js v24.6.0.

Additional context