Comply with ESM syntax.

Conversions/DateDayDifference.js

@@ -38,4 +38,4 @@ const DateDayDifference = (date1, date2) => {
 
 // Example : DateDayDifference('17/08/2002', '10/10/2020') => 6630
 
-module.exports = DateDayDifference
+export { DateDayDifference }

Conversions/DateToDay.js

@@ -61,4 +61,4 @@ const DateToDay = (date) => {
 
 // Example : DateToDay("18/12/2020") => Friday
 
-module.exports = DateToDay
+export { DateToDay }

Conversions/LowerCaseConversion.js

@@ -32,4 +32,4 @@ const LowerCaseConversion = (inputString) => {
   return newString.join('')
 }
 
-module.exports = LowerCaseConversion
+export { LowerCaseConversion }

Conversions/RailwayTimeConversion.js

@@ -32,4 +32,4 @@ const RailwayTimeConversion = (timeString) => {
   }
 }
 
-module.exports = RailwayTimeConversion
+export { RailwayTimeConversion }