Bumped min Dart SDK to 3.3.0, fixed some vexing dependency constraints

lib/session.dart

@@ -126,7 +126,8 @@ class SessionRouteState extends State<SessionRoute> with SingleTickerProviderSta
     // Start observing connectivity changes. If we lose connectivity while
     // a session is active, stop the session and let the user know that
     // the device has gone offline.
-    Connectivity().onConnectivityChanged.listen((ConnectivityResult event) async {
+    Connectivity().onConnectivityChanged.listen((List<ConnectivityResult> events) async {
+      var event = events.last;
       dlog("Connectivity changed: $event");
       if (event == ConnectivityResult.none && session != null && session!.isActive()) {
         await session!.stop();

pubspec.yaml

@@ -6,15 +6,15 @@ homepage: https://embla.is
 repository: https://github.com/mideind/EmblaFlutterApp
 
 environment:
-  sdk: '>=3.0.0 <4.0.0'
-  flutter: ">=3.10.0"
+  sdk: '>=3.3.0 <4.0.0'
+  flutter: ">=3.22.0"
 
 dependencies:
   flutter:
     sdk: flutter
   # Third-party
-  http: '>=1.0.0'
-  shared_preferences: '^2.2.2'
+  http: '>=1.2.1'
+  shared_preferences: '^2.2.3'
   geolocator: '^11.0.0'
   package_info_plus: '4.0.2'
   device_info_plus: '^9.1.2'
@@ -23,10 +23,10 @@ dependencies:
     git:
       url: https://github.com/tommysolsen/platform_device_id.git
       path: platform_device_id
-  connectivity_plus: ^5.0.2
+  connectivity_plus: '>=5.0.2'
   flutter_inappwebview: '^5.7.2+3'
   path_provider: '^2.1.2'
-  wakelock_plus: '1.1.1'
+  wakelock_plus: '>=1.1.1'
   permission_handler: '^10.2.0'
   flutter_fgbg: '^0.3.0'
   logger: '^2.0.1'
@@ -51,10 +51,10 @@ dependencies:
 
 
 dev_dependencies:
-  flutter_test:
-    sdk: flutter
-  test: '>=1.15.4'
-  flutter_lints: '>=2.0.1'
+  # flutter_test:
+  #   sdk: flutter
+  test: '^1.21.5'
+  flutter_lints: '^4.0.0'
 
 # The following section is specific to Flutter.
 flutter: