Bump tensorflow-model-optimization minimum version (when official pruning 2.X support has been added).
Bump tensorflow-model-optimization minimum version (when official pruning 2.X support
has been added).

PiperOrigin-RevId: 286109114

alexgorban/models,tombstone/models,alexgorban/models,tombstone/models,alexgorban/models,tombstone/models,tombstone/models,tombstone/models,alexgorban/models,tombstone/models,alexgorban/models