Fix possible-nil return type of EventPermissionStrategy#getEntityType (#1278)

* Update pubspec.yaml

* Update CHANGELOG.md

* Fix return type of EventPermissionStrategy#getEntityType

This method is causing a compilation warning: -Wint-conversion.

Even ignoring the warning, the nil value would not be tolerated and is never actually returned.

---------

Co-authored-by: Maurits van Beusekom <maurits@vnbskm.nl>

permission_handler_apple/CHANGELOG.md

 ## 9.4.4
 
-* Fixes typo in comment for full calendar access.
+* Fixes potentially-nil return type of EventPermissionStrategy#getEntityType.
+* * Fixes typo in comment for full calendar access.
 
 ## 9.4.3
 

permission_handler_apple/ios/Classes/strategies/EventPermissionStrategy.m

@@ -133,13 +133,11 @@
 }
 
 + (EKEntityType)getEntityType:(PermissionGroup)permission {
-    if (permission == PermissionGroupCalendar || permission == PermissionGroupCalendarFullAccess || permission == PermissionGroupCalendarWriteOnly) {
-        return EKEntityTypeEvent;
-    } else if (permission == PermissionGroupReminders) {
+    if (permission == PermissionGroupReminders) {
         return EKEntityTypeReminder;
     }
 
-    return nil;
+    return EKEntityTypeEvent;
 }
 
 @end