Update flutter version

Author: am15h

.github/workflows/flutter_drive.yml

@@ -23,7 +23,7 @@ jobs:
           java-version: '8.x'
       - uses: subosito/flutter-action@v1
         with:
-          flutter-version: '1.12.13+hotfix.5'
+          flutter-version: '1.17.4'
           channel: 'stable'
       - name: run tests
         timeout-minutes: 30
@@ -37,4 +37,4 @@ jobs:
           profile: ${{ matrix.device }}
           script: |
             cd ./example/image_classification && flutter pub get
-            cd ./example/image_classification && flutter driver --driver='test_driver/image_classification_e2e_test.dart' test/image_classification_e2e.dart
+            cd ./example/image_classification && flutter driver --driver='test_driver/image_classification_e2e_test.dart' test/image_classification_e2e.dart