Update framework and dependencies, clean some code

android/gradle.properties

fastlane/metadata/android/en-US/changelogs/17.txt

fastlane/metadata/android/fr-FR/changelogs/17.txt

ios/Flutter/Generated.xcconfig

ios/Flutter/flutter_export_environment.sh

lib/layout/board.dart

lib/layout/game.dart

lib/layout/keyboard.dart

lib/layout/parameters.dart

lib/main.dart

lib/provider/data.dart

lib/screens/home.dart

lib/utils/game_utils.dart

lib/utils/random_pick_word.dart

pubspec.lock