tool: Enable updating dependencies automatically

tool/update.sh

@@ -25,6 +25,9 @@ if [[ "$1" == "flutter" ]]; then
   find ./packages -name "pubspec.yaml" -exec sed -i "s/flutter: '>=.*'/flutter: '>=$flutter_version'/" {} \;
   find ./packages -name "pubspec.yaml" -exec sed -i "s/sdk: '>=.* <.*'/sdk: '>=$dart_version_major.$dart_version_minor.0 <$dart_version_next_major.0.0'/" {} \;
   fvm exec mono_repo pub get
+elif [[ "$1" == "dependencies" ]]; then
+    fvm exec mono_repo pub upgrade --major-versions
+    fvm exec mono_repo pub upgrade
 elif [ -d "external/nextcloud-$1" ]; then
     update_app "$1"
 else