Update version number to 4.0.0

Author: mvanbeusekom

geocoding_platform_interface/pubspec.yaml

@@ -3,7 +3,7 @@ description: A common platform interface for the geocoding plugin.
 homepage: https://github.com/baseflow/flutter-geocoding/tree/main/geocoding_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 4.0.1
+version: 4.0.0
 
 environment:
   sdk: ^3.8.1