feat(locale): add GB subdivision codes

src/locales/en_GB/location/index.ts

@@ -12,6 +12,7 @@ import county from './county';
 import default_country from './default_country';
 import postcode from './postcode';
 import state from './state';
+import state_abbr from './state_abbr';
 import street_pattern from './street_pattern';
 import street_suffix from './street_suffix';
 
@@ -25,6 +26,7 @@ const location: LocationDefinition = {
   default_country,
   postcode,
   state,
+  state_abbr,
   street_pattern,
   street_suffix,
 };

src/locales/en_GB/location/state.ts

@@ -1 +1 @@
-export default ['England', 'Scotland', 'Wales', 'Northern Ireland'];
+export default ['England', 'Northern Ireland', 'Scotland', 'Wales'];

src/locales/en_GB/location/state_abbr.ts

@@ -0,0 +1 @@
+export default ['ENG', 'NIR', 'SCT', 'WLS'];