feat: bump parse_server_sdk from 6.4.0 to 8.0.2 in /packages/flutter

Bumps [parse_server_sdk](https://github.com/parse-community/Parse-SDK-Flutter) from 6.4.0 to 8.0.2.
- [Release notes](https://github.com/parse-community/Parse-SDK-Flutter/releases)
- [Changelog](https://github.com/parse-community/Parse-SDK-Flutter/blob/master/release.config.js)
- [Commits](dart-6.4.0...dart-8.0.2)

---
updated-dependencies:
- dependency-name: parse_server_sdk
  dependency-version: 8.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

packages/flutter/pubspec.yaml

@@ -25,7 +25,7 @@ dependencies:
   flutter:
     sdk: flutter
 
-  parse_server_sdk: ^6.4.0
+  parse_server_sdk: ">=6.4.0 <9.0.0"
   # Uncomment for local testing
   #parse_server_sdk:
   #   path: ../dart