[google_maps_flutter] Update dependency package (#369)

* Fix a build break

Signed-off-by: Boram Bae <[email protected]>

Author: bbrto21

packages/google_maps_flutter/example/pubspec.yaml

@@ -3,7 +3,7 @@ description: Demonstrates how to use the google_maps_flutter_tizen plugin.
 publish_to: none
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=2.0.0"
 
 dependencies:

packages/google_maps_flutter/pubspec.yaml

@@ -2,7 +2,7 @@ name: google_maps_flutter_tizen
 description: Tizen platform implementation of google_maps_flutter
 homepage: https://github.com/flutter-tizen/plugins
 repository: https://github.com/flutter-tizen/plugins/tree/master/packages/google_maps_flutter
-version: 0.1.1
+version: 0.1.2
 
 flutter:
   plugin:
@@ -18,8 +18,8 @@ dependencies:
   google_maps_flutter_platform_interface: ^2.0.1
   flutter_lints: ^1.0.4
   stream_transform: ^2.0.0
-  webview_flutter: ^2.3.0
-  webview_flutter_tizen: ^0.3.8
+  webview_flutter: ^3.0.1
+  webview_flutter_tizen: ^0.4.1
 
 dev_dependencies:
   flutter_test: