add dev_dependency:pedantic to all plugins (#2543)

packages/webview_flutter/pubspec.yaml

diff --git a/packages/webview_flutter/pubspec.yaml b/packages/webview_flutter/pubspec.yaml
index 97d143a..d19ed47 100644
--- a/packages/webview_flutter/pubspec.yaml
+++ b/packages/webview_flutter/pubspec.yaml
@@ -1,6 +1,6 @@
 name: webview_flutter
 description: A Flutter plugin that provides a WebView widget on Android and iOS.
-version: 0.3.19+7
+version: 0.3.19+8
 homepage: https://github.com/flutter/plugins/tree/master/packages/webview_flutter
 
 environment:
@@ -16,6 +16,7 @@
     sdk: flutter
   flutter_driver:
     sdk: flutter
+  pedantic: ^1.8.0
 
 flutter:
   plugin: