Fixed lint issues

Author: JDDV

example/analysis_options.yaml

@@ -0,0 +1,10 @@
+include: package:flutter_lints/flutter.yaml
+
+analyzer:
+  exclude:
+    # Ignore generated files
+    - '**/*.g.dart'
+    - 'lib/src/generated/*.dart'
+linter:
+  rules:
+    - public_member_api_docs

example/lib/main.dart

@@ -4,10 +4,13 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:google_api_availability/google_api_availability.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 ///Creates the mutable state for this widget
 class MyApp extends StatefulWidget {
+  ///Named [key] parameter to identify a widget
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   _MyAppState createState() => _MyAppState();
 }

example/pubspec.lock

@@ -27,13 +27,27 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.4"
   google_api_availability:
     dependency: "direct dev"
     description:
       path: ".."
       relative: true
     source: path
     version: "3.0.1"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
   meta:
     dependency: transitive
     description:

example/pubspec.yaml

@@ -13,6 +13,7 @@ dependencies:
 dev_dependencies:
   google_api_availability:
     path: ../
+  flutter_lints: 1.0.4
 
 flutter:
   uses-material-design: true

pubspec.yaml

@@ -1,6 +1,6 @@
 name: google_api_availability
 description: A Flutter plugin to check the availability of Google Play Services on an Android device.
-version: 3.0.1
+version: 3.0.2
 homepage: https://github.com/baseflowit/flutter-google-api-availability
 
 environment: