Flutter demo updates (#23)

.github/workflows/flutter-codestyle.yml

@@ -20,10 +20,10 @@ jobs:
     steps:
     - uses: actions/checkout@v3
 
-    - name: Install Flutter 2.8.1
+    - name: Install Flutter 3.22.2
       uses: subosito/flutter-action@v2
       with:
-        flutter-version: 2.8.1
+        flutter-version: 3.22.2
 
     - name: Install dependencies
       run: flutter pub get

.github/workflows/flutter-example.yml

@@ -25,17 +25,13 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        flutter-version: ['2.8.1', '3.0.4', '3.10.6']
+        flutter-version: ['3.3.0', '3.22.2']
         include:
-        - flutter-version: 2.8.1
+        - flutter-version: 3.3.0
           gradle-version: 6.5
           agp-version: 4.1.3
           java-version: 11
-        - flutter-version: 3.0.4
-          gradle-version: 7.5
-          agp-version: 7.4.2
-          java-version: 11
-        - flutter-version: 3.10.6
+        - flutter-version: 3.22.2
           gradle-version: 8.2
           agp-version: 8.2.2
           java-version: 17
@@ -77,7 +73,7 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        flutter-version: ['2.8.1', '3.0.4', '3.10.6']
+        flutter-version: ['3.3.0', '3.22.2']
 
     steps:
     - uses: actions/checkout@v3

example/lib/main.dart

@@ -171,7 +171,7 @@ class _MyAppState extends State<MyApp> {
 
   buildStartButton(BuildContext context) {
     final ButtonStyle buttonStyle = ElevatedButton.styleFrom(
-        primary: picoBlue,
+        backgroundColor: picoBlue,
         shape: CircleBorder(),
         textStyle: TextStyle(color: Colors.white));
 

example/pubspec.yaml

@@ -4,7 +4,8 @@ description: Demonstrates how to use the flutter_voice_processor plugin.
 publish_to: 'none'
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.18.0 <4.0.0"
+  flutter: ">=3.3.0"
 
 dependencies:
   flutter: