Add support for Null Safety

.github/workflows/flutter.yml

@@ -16,7 +16,7 @@ jobs:
         java-version: '12.x'
     - uses: subosito/flutter-action@v1
       with:
-        flutter-version: '1.22.4'
+        flutter-version: '2.0.3'
     - run: flutter pub get
     - run: flutter test
     - run: flutter analyze --no-pub --no-current-package lib

example/ios/Podfile.lock

@@ -1,11 +1,11 @@
 PODS:
   - Flutter (1.0.0)
-  - Mixpanel-swift (2.8.1):
-    - Mixpanel-swift/Complete (= 2.8.1)
-  - Mixpanel-swift/Complete (2.8.1)
-  - mixpanel_flutter (0.0.1):
+  - Mixpanel-swift (2.8.3):
+    - Mixpanel-swift/Complete (= 2.8.3)
+  - Mixpanel-swift/Complete (2.8.3)
+  - mixpanel_flutter (1.0.1):
     - Flutter
-    - Mixpanel-swift (= 2.8.1)
+    - Mixpanel-swift (= 2.8.3)
 
 DEPENDENCIES:
   - Flutter (from `Flutter`)
@@ -22,9 +22,9 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/mixpanel_flutter/ios"
 
 SPEC CHECKSUMS:
-  Flutter: 0e3d915762c693b495b44d77113d4970485de6ec
-  Mixpanel-swift: 9d3a2597ef015f187abae0bfa5fda5997d5e4429
-  mixpanel_flutter: 78b688d373cd5f0bb5bee423e323124ba3048353
+  Flutter: 434fef37c0980e73bb6479ef766c45957d4b510c
+  Mixpanel-swift: 947354668bf7dcaff5aaf9c64232fb5bea6ff0c7
+  mixpanel_flutter: 59130decd93dbb51e1a8a258d0d9af432287768e
 
 PODFILE CHECKSUM: aafe91acc616949ddb318b77800a7f51bffa2a4c
 

example/lib/analytics.dart

@@ -2,14 +2,14 @@ import 'package:mixpanel_flutter/mixpanel_flutter.dart';
 
 class MixpanelManager {
 
-  static Mixpanel _instance;
+  static Mixpanel? _instance;
 
   static Future<Mixpanel> init() async {
     if (_instance == null) {
       _instance = await Mixpanel.init("Your Mixpanel Token",
           optOutTrackingDefault: false);
     }
-    return _instance;
+    return _instance!;
   }
 
 }

example/lib/event.dart

@@ -11,10 +11,10 @@ class EventScreen extends StatefulWidget {
 }
 
 class _EventScreenState extends State<EventScreen> {
-  Mixpanel _mixpanel;
+  late final Mixpanel _mixpanel;
 
   @override
-  Future<void> initState() {
+  initState() {
     super.initState();
     _initMixpanel();
   }

example/lib/gdpr.dart

@@ -9,7 +9,7 @@ class GDPRScreen extends StatefulWidget {
 }
 
 class _GDPRScreenState extends State<GDPRScreen> {
-  Mixpanel _mixpanel;
+  late final Mixpanel _mixpanel;
 
   @override
   void initState() {

example/lib/group.dart

@@ -9,8 +9,8 @@ class GroupScreen extends StatefulWidget {
 }
 
 class _GroupScreenState extends State<GroupScreen> {
-  Mixpanel _mixpanel;
-  MixpanelGroup _mixpanelGroup;
+  late final Mixpanel _mixpanel;
+  late final MixpanelGroup _mixpanelGroup;
 
   @override
   void initState() {

example/lib/profile.dart

@@ -9,7 +9,7 @@ class ProfileScreen extends StatefulWidget {
 }
 
 class _ProfileScreenState extends State<ProfileScreen> {
-  Mixpanel _mixpanel;
+  late final Mixpanel _mixpanel;
 
   @override
   void initState() {

example/lib/widget.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 
 class MixpanelButton extends StatelessWidget {
-  MixpanelButton({@required this.onPressed, @required this.text});
+  MixpanelButton({required this.onPressed, required this.text});
   final GestureTapCallback onPressed;
   final String text;
 

example/pubspec.lock

@@ -7,42 +7,42 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0-nullsafety.1"
+    version: "2.5.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0"
   characters:
     dependency: transitive
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.1"
+    version: "1.1.0"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.3"
+    version: "1.15.0"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -56,7 +56,7 @@ packages:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -73,28 +73,28 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10-nullsafety.1"
+    version: "0.12.10"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0"
   mixpanel_flutter:
     dependency: "direct main"
     description:
       path: ".."
       relative: true
     source: path
-    version: "1.0.0"
+    version: "1.0.1"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.1"
+    version: "1.8.0"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -106,56 +106,56 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.2"
+    version: "1.8.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0-nullsafety.1"
+    version: "1.10.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.1"
+    version: "1.1.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19-nullsafety.2"
+    version: "0.2.19"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0"
 sdks:
-  dart: ">=2.10.0-110 <2.11.0"
+  dart: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"

example/pubspec.yaml

@@ -4,7 +4,7 @@ description: Demonstrates how to use the mixpanel_flutter plugin.
 publish_to: 'none'
 
 environment:
-  sdk: ">=2.7.0 <3.0.0"
+  sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
   flutter: