Bump version to v0.28.1 (horovod#3942)

Signed-off-by: Max H. Gerlach <[email protected]>

Update release date

Signed-off-by: Max H. Gerlach <[email protected]>

Bump version to 0.27.0 (horovod#3832)

Signed-off-by: Max H. Gerlach <[email protected]>

Bum version to 0.26.1 (horovod#3745)

Signed-off-by: Enrico Minack <[email protected]>

Bump version to 0.26.0 (horovod#3731)

Signed-off-by: Enrico Minack <[email protected]>

Bump version to 0.25.0 (horovod#3581)

Signed-off-by: Enrico Minack <[email protected]>

Bump version to 0.24.3

Signed-off-by: Enrico Minack <[email protected]>

Hotfix for cmake

Bump version to 0.24.1 (horovod#3446)

Signed-off-by: Enrico Minack <[email protected]>

Ray Elastic v2 API and elastic improvements