Convert methods to ES6 exports

app/assets/javascripts/lib/utils/datetime_utility.js

@@ -74,10 +74,9 @@ let timeagoInstance;
 /**
  * Sets a timeago Instance
  */
-export function getTimeago() {
+export const getTimeago = () => {
   if (!timeagoInstance) {
-    const localeRemaining = function getLocaleRemaining(number, index) {
-      return [
+    const localeRemaining = (number, index) => [
       [s__('Timeago|just now'), s__('Timeago|right now')],
       [s__('Timeago|%s seconds ago'), s__('Timeago|%s seconds remaining')],
       [s__('Timeago|1 minute ago'), s__('Timeago|1 minute remaining')],
@@ -93,9 +92,8 @@ export function getTimeago() {
       [s__('Timeago|1 year ago'), s__('Timeago|1 year remaining')],
       [s__('Timeago|%s years ago'), s__('Timeago|%s years remaining')],
     ][index];
-    };
-    const locale = function getLocale(number, index) {
-      return [
+
+    const locale = (number, index) => [
       [s__('Timeago|just now'), s__('Timeago|right now')],
       [s__('Timeago|%s seconds ago'), s__('Timeago|in %s seconds')],
       [s__('Timeago|1 minute ago'), s__('Timeago|in 1 minute')],
@@ -111,7 +109,6 @@ export function getTimeago() {
       [s__('Timeago|1 year ago'), s__('Timeago|in 1 year')],
       [s__('Timeago|%s years ago'), s__('Timeago|in %s years')],
     ][index];
-    };
 
     timeago.register(timeagoLanguageCode, locale);
     timeago.register(`${timeagoLanguageCode}-remaining`, localeRemaining);
@@ -184,7 +181,7 @@ export const getDayDifference = (a, b) => {
  * @param  {Number} seconds
  * @return {String}
  */
-export function timeIntervalInWords(intervalInSeconds) {
+export const timeIntervalInWords = (intervalInSeconds) => {
   const secondsInteger = parseInt(intervalInSeconds, 10);
   const minutes = Math.floor(secondsInteger / 60);
   const seconds = secondsInteger - minutes * 60;
@@ -198,7 +195,7 @@ export function timeIntervalInWords(intervalInSeconds) {
   return text;
 }
 
-export function dateInWords(date, abbreviated = false, hideYear = false) {
+export const dateInWords = (date, abbreviated = false, hideYear = false) => {
   if (!date) return date;
 
   const month = date.getMonth();