removed unused deps + updated README, target SDKs

pubspec.lock

@@ -1,13 +1,6 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
-  app_installer:
-    dependency: "direct main"
-    description:
-      name: app_installer
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.0"
   args:
     dependency: transitive
     description:
@@ -85,13 +78,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.1.2"
-  file_picker:
-    dependency: "direct main"
-    description:
-      name: file_picker
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "5.0.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -139,37 +125,11 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "5.0.0"
-  flutter_plugin_android_lifecycle:
-    dependency: transitive
-    description:
-      name: flutter_plugin_android_lifecycle
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.7"
   flutter_test:
     dependency: "direct dev"
     description: flutter
     source: sdk
     version: "0.0.0"
-  flutter_web_plugins:
-    dependency: transitive
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  install_plugin_v2:
-    dependency: "direct main"
-    description:
-      name: install_plugin_v2
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.0"
-  js:
-    dependency: transitive
-    description:
-      name: js
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.6.4"
   lints:
     dependency: transitive
     description:
@@ -261,41 +221,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.2"
-  permission_handler:
-    dependency: "direct main"
-    description:
-      name: permission_handler
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "10.0.0"
-  permission_handler_android:
-    dependency: transitive
-    description:
-      name: permission_handler_android
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "10.0.0"
-  permission_handler_apple:
-    dependency: transitive
-    description:
-      name: permission_handler_apple
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "9.0.4"
-  permission_handler_platform_interface:
-    dependency: transitive
-    description:
-      name: permission_handler_platform_interface
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "3.7.0"
-  permission_handler_windows:
-    dependency: transitive
-    description:
-      name: permission_handler_windows
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.1.0"
   petitparser:
     dependency: transitive
     description: