Bump extended_image from 6.4.1 to 7.0.2

Bumps [extended_image](https://github.com/fluttercandies/extended_image) from 6.4.1 to 7.0.2.
- [Release notes](https://github.com/fluttercandies/extended_image/releases)
- [Changelog](https://github.com/fluttercandies/extended_image/blob/master/CHANGELOG.md)
- [Commits](https://github.com/fluttercandies/extended_image/commits)

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

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