feat(locale): add Welsh (cy) postcode definitions

Based on the `en_GB` postcode definitions with prefix as recommened by @matthewmayer.

Author: IestynGage

src/locales/cy/location/index.ts

@@ -6,11 +6,15 @@ import type { LocationDefinition } from '../../..';
 import county from './county';
 import direction from './direction';
 import postal_address from './postal_address';
+import postcode from './postcode';
+import postcode_prefix from './postcode_prefix';
 
 const location: LocationDefinition = {
   county,
   direction,
   postal_address,
+  postcode,
+  postcode_prefix,
 };
 
 export default location;

src/locales/cy/location/postcode.ts

@@ -0,0 +1,4 @@
+export default [
+  '{{location.postcode_prefix}}# #??',
+  '{{location.postcode_prefix}}## #??',
+];

src/locales/cy/location/postcode_prefix.ts

@@ -0,0 +1 @@
+export default ['CF', 'CH', 'HR', 'LD', 'LL', 'NP', 'SA', 'SY'];

test/__snapshots__/locale-data.spec.ts.snap

@@ -8,7 +8,7 @@ exports[`locale-data > should only have known characters 1`] = `
   "base": " ()+,-./:;ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz",
   "bn_BD": " (),-ঁংঅআইঈউএওকখগঘঙচছজঝঞটঠডঢণতথদধনপফবভমযরলশষসহ়ািীুূৃেৈোৌ্ড়য়",
   "cs_CZ": " #()+-.ABCDEFGHIJKLMNOPRSTUVWXZabcdefghijklmnopqrstuvwxyzÁÍÚáéíóöúüýČčĎďěňŘřŠšťůűŽž",
-  "cy": " ,-ABCDEFGHILMNOPRSTWYabcdefghijklmnoprstuwyôŵ",
+  "cy": " #,-?ABCDEFGHILMNOPRSTWYabcdefghijklmnoprstuwyôŵ",
   "da": " !"#()+,-./ABCDEFGHIJKLMNOPQRSTUVWYZabcdefghijklmnopqrstuvwxyzÅÆØãåæçéíø",
   "de": " #&'()+,-.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzÄÖÜßàãäéíöúü",
   "de_AT": " #&()+,-.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzÄÖÜßãäéíöúü",