chore(deps): bump objectbox_flutter_libs from 5.2.0 to 5.3.0

[dependabot]

Bumps objectbox_flutter_libs from 5.2.0 to 5.3.0.

Release notes

Sourced from objectbox_flutter_libs's releases.

5.3.0

• Update ObjectBox database for Flutter Linux/Windows, Dart Native apps to 5.3.0-2026-03-23
• Update ObjectBox database for Flutter Android apps to 5.3.0-2026-03-23. If your project is using Admin, make sure to update to io.objectbox:objectbox-android-objectbrowser:5.4.0 in android/app/build.gradle.kts or android/app/build.gradle.
• Update ObjectBox database for Flutter iOS/macOS apps to 5.3.0-2026-03-23. For existing projects, run pod repo update and pod update ObjectBox in the ios or macos directories.

Sync

• Customizable conflict resolution via the new annotations @SyncClock() and @SyncPrecedence() (see docs for details)
• Sync protocol version 10
• SyncClient: support updating filter variables. After login, stage updates using put and remove, then schedule to send them to the server with applyFilterVariables().
• Clients report errors to the server
• Fix bad Sync client state after multiple full sync messages were interrupted
• Fix adding indexes to Sync types

Commits

• 9331c10 Prepare release 5.3.0
• f723c5b READMEs: update copyright year, fix badges, update contact link
• 94f6c9a Changelog: Sync protocol version 10, clients report errors
• 61c8d8a Update ObjectBox CocoaPod [5.2.0 -> 5.3.0-beta.3]
• 6850760 set-swift-version.sh: replace any version string
• f97f6d4 Update objectbox-android [5.3.1-preview1 -> 5.4.0]
• d55d2dc Sync conflict resolution: expect real clock value in test #177
• 69994e9 SyncClient: support applyFilterVariables on all platforms #174
• df7753f Update C API [5.2.0 -> 5.3.0]
• 643daaa Update C library [5.2.0 -> 5.3.0]
• Additional commits viewable in compare view

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