possible relaxation on the `tensorboardX` hardwired version requirement

[stas00]

I'm having a bit of a yo-yo conflicting requirements between deepspeed and a sub-dependency of transformers:

deepspeed wants tensorboardX==1.8

cd transformers
pip install -e .[dev]
[...]
  Attempting uninstall: tensorboardX
    Found existing installation: tensorboardX 1.8
    Uninstalling tensorboardX-1.8:
      Successfully uninstalled tensorboardX-1.8
Successfully installed tensorboardX-2.4

Traced it to: ray:

$ pip install tensorboardX==1.8; pip install ray[tune]
(as above)

https://github.com/ray-project/ray/blob/56619b955e627d044bd948c38c14816c3a00052a/python/requirements.txt#L41

tensorboardX >= 1.9

but deepspeed's is tensorboardX==1.8

Could deepspeed use tensorboardX>=1.8,<2.0