added screenshot logo of plaid

pubspec.yaml

@@ -1,9 +1,12 @@
 name: plaid_flutter
 description: Plaid Link for Flutter. Integrates the native iOS, Android and Web SDKs.
-version: 3.0.1
+version: 3.1.0
 homepage: https://github.com/jorgefspereira/plaid_flutter
 repository: https://github.com/jorgefspereira/plaid_flutter
 issue_tracker: https://github.com/jorgefspereira/plaid_flutter/issues
+screenshots:
+  - description: The persona logo.
+    path: doc/screenshots/logo.jpg
 
 environment:
   sdk: '>=2.12.0 <3.0.0'
@@ -21,16 +24,7 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
 
-# For information on the generic Dart part of this file, see the
-# following page: https://www.dartlang.org/tools/pub/pubspec
-
-# The following section is specific to Flutter.
 flutter:
-  # This section identifies this Flutter project as a plugin project.
-  # The androidPackage and pluginClass identifiers should not ordinarily
-  # be modified. They are used by the tooling to maintain consistency when
-  # adding or updating assets for this project.
-
   plugin:
     platforms:
       android:
@@ -40,35 +34,4 @@ flutter:
         pluginClass: PlaidFlutterPlugin
       web:
         pluginClass: PlaidFlutterPlugin
-        fileName: src/platform/plaid_flutter_web.dart
-
-  # To add assets to your plugin package, add an assets section, like this:
-  # assets:
-  #  - images/a_dot_burr.jpeg
-  #  - images/a_dot_ham.jpeg
-  #
-  # For details regarding assets in packages, see
-  # https://flutter.io/assets-and-images/#from-packages
-  #
-  # An image asset can refer to one or more resolution-specific "variants", see
-  # https://flutter.io/assets-and-images/#resolution-aware.
-
-  # To add custom fonts to your plugin package, add a fonts section here,
-  # in this "flutter" section. Each entry in this list should have a
-  # "family" key with the font family name, and a "fonts" key with a
-  # list giving the asset and other descriptors for the font. For
-  # example:
-  # fonts:
-  #   - family: Schyler
-  #     fonts:
-  #       - asset: fonts/Schyler-Regular.ttf
-  #       - asset: fonts/Schyler-Italic.ttf
-  #         style: italic
-  #   - family: Trajan Pro
-  #     fonts:
-  #       - asset: fonts/TrajanPro.ttf
-  #       - asset: fonts/TrajanPro_Bold.ttf
-  #         weight: 700
-  #
-  # For details regarding fonts in packages, see
-  # https://flutter.io/custom-fonts/#from-packages
+        fileName: src/platform/plaid_flutter_web.dart