[webview_flutter] Bump platform interface dependency

Author: khaled-0

packages/webview_flutter/webview_flutter/example/pubspec.yaml

@@ -26,7 +26,7 @@ dev_dependencies:
     sdk: flutter
   integration_test:
     sdk: flutter
-  webview_flutter_platform_interface: ^2.13.0
+  webview_flutter_platform_interface: ^2.15.1
 
 flutter:
   uses-material-design: true

packages/webview_flutter/webview_flutter/pubspec.yaml

@@ -22,7 +22,7 @@ dependencies:
   flutter:
     sdk: flutter
   webview_flutter_android: ^4.7.0
-  webview_flutter_platform_interface: ^2.13.0
+  webview_flutter_platform_interface: ^2.15.1
   webview_flutter_wkwebview: ^3.22.0
 
 dev_dependencies:

packages/webview_flutter/webview_flutter_android/example/pubspec.yaml

@@ -17,7 +17,7 @@ dependencies:
     # The example app is bundled with the plugin so we use a path dependency on
     # the parent directory to use the current plugin's version.
     path: ../
-  webview_flutter_platform_interface: ^2.14.0
+  webview_flutter_platform_interface: ^2.15.1
 
 dev_dependencies:
   espresso: ^0.4.0

packages/webview_flutter/webview_flutter_android/pubspec.yaml

@@ -21,7 +21,7 @@ dependencies:
   flutter:
     sdk: flutter
   meta: ^1.10.0
-  webview_flutter_platform_interface: ^2.14.0
+  webview_flutter_platform_interface: ^2.15.1
 
 dev_dependencies:
   build_runner: ^2.1.4

packages/webview_flutter/webview_flutter_wkwebview/example/pubspec.yaml

@@ -10,7 +10,7 @@ dependencies:
   flutter:
     sdk: flutter
   path_provider: ^2.0.6
-  webview_flutter_platform_interface: ^2.14.0
+  webview_flutter_platform_interface: ^2.15.1
   webview_flutter_wkwebview:
     # When depending on this package from a real application you should use:
     #   webview_flutter: ^x.y.z

packages/webview_flutter/webview_flutter_wkwebview/pubspec.yaml

@@ -26,7 +26,7 @@ dependencies:
     sdk: flutter
   meta: ^1.10.0
   path: ^1.8.0
-  webview_flutter_platform_interface: ^2.14.0
+  webview_flutter_platform_interface: ^2.15.1
 
 dev_dependencies:
   build_runner: ^2.1.5