Change Charset for Hash calculation (#414)

Author: jonas0b1011001

Helpers.gs

@@ -255,7 +255,7 @@ function parseResponses(responses){
 
   result.forEach(function(event){
     if (!event.hasProperty('uid')){
-      event.updatePropertyWithValue('uid', Utilities.computeDigest(Utilities.DigestAlgorithm.MD5, event.toString()).toString());
+      event.updatePropertyWithValue('uid', Utilities.computeDigest(Utilities.DigestAlgorithm.MD5, event.toString()).toString(), Utilities.Charset.UTF_8);
     }
     if(event.hasProperty('recurrence-id')){
       let recID = new ICAL.Time.fromString(event.getFirstPropertyValue('recurrence-id').toString(), event.getFirstProperty('recurrence-id'));
@@ -579,7 +579,7 @@ function createEvent(event, calendarTz){
     return;
   }
 
-  var digest = Utilities.computeDigest(Utilities.DigestAlgorithm.MD5, icalEvent.toString()).toString();
+  var digest = Utilities.computeDigest(Utilities.DigestAlgorithm.MD5, icalEvent.toString(), Utilities.Charset.UTF_8).toString();
   if(calendarEventsMD5s.indexOf(digest) >= 0){
     Logger.log("Skipping unchanged Event " + event.getFirstPropertyValue('uid').toString());
     return;