Added locale en-GB (#563)

src/locale/en-GB/_lib/formatLong/index.js

@@ -0,0 +1,12 @@
+import buildFormatLongFn from '../../../_lib/buildFormatLongFn/index.js'
+
+var formatLong = buildFormatLongFn({
+  LT: 'HH:mm',
+  LTS: 'HH:mm:ss',
+  L: 'DD/MM/YYYY',
+  LL: 'D MMMM YYYY',
+  LLL: 'D MMMM YYYY HH:mm',
+  LLLL: 'dddd, D MMMM YYYY HH:mm'
+})
+
+export default formatLong

src/locale/en-GB/index.js

@@ -0,0 +1,27 @@
+import formatDistance from '../en-US/_lib/formatDistance/index.js'
+import formatLong from './_lib/formatLong/index.js'
+import formatRelative from '../en-US/_lib/formatRelative/index.js'
+import localize from '../en-US/_lib/localize/index.js'
+import match from '../en-US/_lib/match/index.js'
+
+/**
+ * @type {Locale}
+ * @category Locales
+ * @summary English locale (United Kingdom).
+ * @language English
+ * @iso-639-2 eng
+ * @author Alex [@glintik]{@link https://github.com/glintik}
+ */
+var locale = {
+  formatDistance: formatDistance,
+  formatLong: formatLong,
+  formatRelative: formatRelative,
+  localize: localize,
+  match: match,
+  options: {
+    weekStartsOn: 1 /* Monday */,
+    firstWeekContainsDate: 4
+  }
+}
+
+export default locale

src/locale/en-GB/index.js.flow

@@ -0,0 +1,37 @@
+// @flow
+// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
+
+type Locale = {
+  formatDistance: Function,
+  formatLong: Function,
+  formatRelative: Function,
+  localize: {
+    ordinalNumber: Function,
+    weekday: Function,
+    weekdays: Function,
+    month: Function,
+    months: Function,
+    timeOfDay: Function,
+    timesOfDay: Function
+  },
+  match: {
+    ordinalNumbers: Function,
+    ordinalNumber: Function,
+    weekdays: Function,
+    weekday: Function,
+    months: Function,
+    month: Function,
+    timesOfDay: Function,
+    timeOfDay: Function
+  },
+  formatters?: Object,
+  formattingTokensRegExp?: RegExp,
+  units?: Object,
+  parsers?: Object,
+  parsingTokensRegExp?: RegExp,
+  options?: {
+    weekStartsOn?: 0 | 1 | 2 | 3 | 4 | 5 | 6
+  }
+}
+
+declare module.exports: Locale