feat(Flag): include "england" as a valid value (#3996)

Author: layershifter

docs/src/examples/elements/Flag/Types/FlagExampleTable.js

@@ -68,6 +68,7 @@ const countries = [
   { name: 'Ecuador', countryCode: 'ec' },
   { name: 'Egypt', countryCode: 'eg' },
   { name: 'El Salvador', countryCode: 'sv' },
+  { name: 'England', countryCode: 'gb eng' },
   { name: 'Equatorial Guinea', countryCode: 'gq' },
   { name: 'Eritrea', countryCode: 'er' },
   { name: 'Estonia', countryCode: 'ee' },

src/elements/Flag/Flag.js

@@ -132,6 +132,8 @@ export const names = [
   'algeria',
   'ec',
   'ecuador',
+  'england',
+  'gb eng',
   'ee',
   'estonia',
   'eg',