Bump shared_preferences from 2.0.18 to 2.0.20 (#76)

Bumps [shared_preferences](https://github.com/flutter/packages/tree/main/packages/shared_preferences) from 2.0.18 to 2.0.20.
- [Release notes](https://github.com/flutter/packages/releases)
- [Commits](https://github.com/flutter/packages/commits/shared_preferences-v2.0.20/packages/shared_preferences)

---
updated-dependencies:
- dependency-name: shared_preferences
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Sun <huachuang20@gmail.com>

pubspec.lock

@@ -422,7 +422,7 @@ packages:
       name: image_picker_android
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.8.6+5"
+    version: "0.8.6+6"
   image_picker_for_web:
     dependency: transitive
     description:
@@ -574,7 +574,7 @@ packages:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.13"
+    version: "2.0.14"
   path_provider_android:
     dependency: transitive
     description:
@@ -791,7 +791,7 @@ packages:
       name: shared_preferences
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.18"
+    version: "2.0.20"
   shared_preferences_android:
     dependency: transitive
     description:
@@ -929,7 +929,7 @@ packages:
       name: url_launcher_android
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.0.25"
+    version: "6.0.26"
   url_launcher_ios:
     dependency: transitive
     description:

pubspec.yaml

@@ -18,7 +18,7 @@ dependencies:
     sdk: flutter
   flutter_localized_locales: ^2.0.3
   provider: ^6.0.5 # state manager
-  shared_preferences: ^2.0.18
+  shared_preferences: ^2.0.20
   path_provider: ^2.0.11
   url_launcher: ^6.1.6
   permission_handler: ^10.2.0