Flysystem 3.0 has been released and this bundle should add support for it.
All of the first-party adapters are compatible with both 2.x and 3.x, however, the third-party royvoetman/flysystem-gitlab-storage package (which is a dev dependency of this bundle) is not yet updated to support the new version. While the third-party package not being compatible wouldn't block a new release with support for Flysystem 3.0, until it is updated, you wouldn't be able to install this bundle with dev dependencies and get 3.0 installed.
Feature Request
Summary
Flysystem 3.0 has been released and this bundle should add support for it.
All of the first-party adapters are compatible with both 2.x and 3.x, however, the third-party
royvoetman/flysystem-gitlab-storage
package (which is a dev dependency of this bundle) is not yet updated to support the new version. While the third-party package not being compatible wouldn't block a new release with support for Flysystem 3.0, until it is updated, you wouldn't be able to install this bundle with dev dependencies and get 3.0 installed.