added flutter_lints

analysis_options.yaml

@@ -1,3 +1,24 @@
+include: package:flutter_lints/flutter.yaml
+
 analyzer:
   exclude:
     - "**/generated_plugin_registrant.dart"
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at
+  # https://dart-lang.github.io/linter/lints/index.html.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

pubspec.yaml

@@ -23,7 +23,8 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
-
+  flutter_lints: ^3.0.0
+
 flutter:
   plugin:
     platforms: