updated pubspec version (#265)

Author: TimHoogstrate

geocoding/pubspec.yaml

@@ -1,6 +1,6 @@
 name: geocoding
 description: A Flutter Geocoding plugin which provides easy geocoding and reverse-geocoding features.
-version: 3.0.1
+version: 4.0.0
 repository: https://github.com/baseflow/flutter-geocoding/tree/main/geocoding
 issue_tracker: https://github.com/Baseflow/flutter-geocoding/issues