Updation of All the packages inside pubspec.yaml to latest one so that this project can be run using latest dart SDK

Author: harsh159357

android/build.gradle

@@ -5,7 +5,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.2.1'
     }
 }
 

android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

lib/generated/i18n.dart

@@ -0,0 +1,78 @@
+
+import 'dart:async';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+// ignore_for_file: non_constant_identifier_names
+// ignore_for_file: camel_case_types
+// ignore_for_file: prefer_single_quotes
+
+//This file is automatically generated. DO NOT EDIT, all your changes would be lost.
+
+class S implements WidgetsLocalizations {
+  const S();
+
+  static const GeneratedLocalizationsDelegate delegate =
+      const GeneratedLocalizationsDelegate();
+
+  static S of(BuildContext context) =>
+      Localizations.of<S>(context, WidgetsLocalizations);
+
+  @override
+  TextDirection get textDirection => TextDirection.ltr;
+
+}
+
+class en extends S {
+  const en();
+}
+
+
+class GeneratedLocalizationsDelegate extends LocalizationsDelegate<WidgetsLocalizations> {
+  const GeneratedLocalizationsDelegate();
+
+  List<Locale> get supportedLocales {
+    return const <Locale>[
+
+      const Locale("en", ""),
+
+    ];
+  }
+
+  LocaleResolutionCallback resolution({Locale fallback}) {
+    return (Locale locale, Iterable<Locale> supported) {
+      final Locale languageLocale = new Locale(locale.languageCode, "");
+      if (supported.contains(locale))
+        return locale;
+      else if (supported.contains(languageLocale))
+        return languageLocale;
+      else {
+        final Locale fallbackLocale = fallback ?? supported.first;
+        return fallbackLocale;
+      }
+    };
+  }
+
+  @override
+  Future<WidgetsLocalizations> load(Locale locale) {
+    final String lang = getLang(locale);
+    switch (lang) {
+
+      case "en":
+        return new SynchronousFuture<WidgetsLocalizations>(const en());
+
+      default:
+        return new SynchronousFuture<WidgetsLocalizations>(const S());
+    }
+  }
+
+  @override
+  bool isSupported(Locale locale) => supportedLocales.contains(locale);
+
+  @override
+  bool shouldReload(GeneratedLocalizationsDelegate old) => false;
+}
+
+String getLang(Locale l) => l.countryCode != null && l.countryCode.isEmpty
+    ? l.languageCode
+    : l.toString();

pubspec.yaml

@@ -5,20 +5,20 @@ dependencies:
   flutter:
     sdk: flutter
 
-  flutter_launcher_icons: ^0.3.3
-  shared_preferences: ^0.4.2
-  json_annotation: ^0.2.4
+  flutter_launcher_icons: ^0.6.1
+  shared_preferences: ^0.4.3
+  json_annotation: ^2.0.0
   cupertino_icons: ^0.1.2
-  http: ^0.11.3+16
+  http: ^0.12.0
 
 flutter_icons:
   image_path: "assets/images/ic_launcher.png"
   android: true
   ios: true
 
 dev_dependencies:
-  build_runner: ^0.8.0
-  json_serializable: ^0.5.2
+  build_runner: ^1.1.2
+  json_serializable: ^2.0.0
 
   flutter_test:
     sdk: flutter

res/values/strings_en.arb

@@ -0,0 +1 @@
+{}