Umstellung auf UTC Timestamp

pubspec.yaml

@@ -16,10 +16,10 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 340.0.0+340
+version: 343.0.0+343
 
 environment:
-  sdk: '>=2.19.6 <3.0.0'
+  sdk: '>=3.5.0 <4.0.0'
 
 isar_version: &isar_version 3.1.8 # define the version to be used