Flutter version failed

Question

The current Flutter SDK version is 1.12.13+hotfix.8.

Because flutterbuyandsell depends on provider 4.1.2 which requires Flutter SDK version>=1.16.0, version solving failed. pub get failed (1; Because flutterbuyandsell depends on provider 4.1.2 which requires Flutter SDK version>=1.16.0, version solving failed.)

My pubspec.yaml

name: flutterbuyandsell
description: A new Flutter ecommerce store application.
version: 1.17.0
environment:
 sdk: ">=2.2.2 <3.0.0"
dependencies:
 flutter:
 sdk: flutter
 flutter_localizations:
 sdk: flutter
 # The following adds the Cupertino Icons font to your application.
 # Use with the CupertinoIcons class for iOS style icons.
 shared_preferences: 0.5.7+3
 cached_network_image: 2.2.0+1
 flutter_cache_manager: 1.2.2 #for cached_network_image
 http: 0.12.1
 provider: 4.1.2
 connectivity: 0.4.8+6
 dynamic_theme: 1.0.1
 sembast: 2.4.4+1
 path_provider: 1.6.9
 intl: 0.16.1
 shimmer: 1.1.1
 smooth_star_rating: 1.1.1
 url_launcher: 5.4.10
 carousel_slider: 2.1.0
 firebase_core: 0.4.5
 firebase_messaging: 6.0.16
 firebase_auth: 0.16.1 # firebase_auth is for phone login
 admob_flutter: 0.3.4
 firebase_database: 3.1.6
 google_sign_in: 4.5.1
 flutter_facebook_login: 3.0.0
 photo_view: 0.9.2
 progress_dialog: 1.2.3
 braintree_payment: 1.2.4
 easy_localization: 2.3.2
 launch_review: 2.0.0
 package_info: 0.4.0+18
 flutter_icons: 1.1.0
 stripe_payment: 1.0.7
 flutter_credit_card: 0.1.3
 fluttertoast: 4.0.1
 permission_handler: 5.0.0+hotfix.6
 flutter_map: 0.9.0
 latlong: 0.6.1
 geocoder: 0.2.1
 multi_image_picker: 4.6.7
 flutter_widget_from_html: 0.3.3+4
 esys_flutter_share: 1.0.2
 apple_sign_in: 0.1.0
dev_dependencies:
 flutter_test:
 sdk: flutter
 #flutter_local_notifications:
 # path: lib/utils/local_noti/
# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec
# The following section is specific to Flutter.
flutter:
 # The following line ensures that the Material Icons font is
 # included with your application, so that you can use the icons in
 # the material Icons class.
 uses-material-design: true
 # To add assets to your application, add an assets section, like this:
 assets:
 - assets/images/placeholder_circle_image.png
 - assets/images/placeholder_image.png
 - assets/langs/ar-DZ.json
 - assets/langs/en-US.json
 - assets/langs/hi-IN.json
 - assets/langs/de-DE.json
 - assets/langs/es-ES.json
 - assets/langs/fr-FR.json
 - assets/langs/id-ID.json
 - assets/langs/it-IT.json
 - assets/langs/ja-JP.json
 - assets/langs/ko-KR.json
 - assets/langs/ms-MY.json
 - assets/langs/pt-PT.json
 - assets/langs/ru-RU.json
 - assets/langs/th-TH.json
 - assets/langs/tr-TR.json
 - assets/langs/zh-CN.json
 - assets/images/verify_email_icon.jpg
 - assets/images/down.png
 - assets/images/baesline_access_time_black_24.png
 - assets/images/baseline_check_green_24.png
 - assets/images/baseline_graph_black_24.png
 - assets/images/baseline_price_down_black_24.png
 - assets/images/baseline_price_up_black_24.png
 - assets/images/baseline_empty_item_grey_24.png
 - assets/images/home_icon/discount_products.png
 - assets/images/home_icon/easy_payment.png
 - assets/images/home_icon/featured_products.png
 - assets/images/home_icon/free_download.png
 - assets/images/trending.png
 - assets/images/flutter_buy_and_sell_logo.png
 - assets/images/flutter_buy_and_sell_logo_light.png
 - assets/images/baseline_pin_black_24.png
 - assets/images/baseline_favourite_grey_24.png
 - assets/images/default_image.png
 - assets/images/baseline_promotion_color_74.png
 fonts:
 - family: Product Sans
 fonts:
 - asset: assets/fonts/Product-Sans-Regular.ttf
 - asset: assets/fonts/Product-Sans-Bold-Italic.ttf
 - asset: assets/fonts/Product-Sans-Bold.ttf
 - asset: assets/fonts/Product-Sans-Italic.ttf

Answer 1

The latest version of flutter on the stable channel is 1.17.3 and higher on the other channels. You have likely not upgraded flutter since this release. Use flutter upgrade to remediate your issue.