Update tensorflow-hub requirement to allow 0.12.0?

[suryaavala]

If the feature is related to a specific library below, please raise an issue in
the respective repo directly:

TensorFlow Data Validation Repo

TensorFlow Model Analysis Repo

TensorFlow Transform Repo

TensorFlow Serving Repo

System information

• TFX Version (you are using): 1.0.0-rc0
• Environment in which you plan to use the feature (e.g., Local
  (Linux/MacOS/Windows), Interactive Notebook, Google Cloud, etc..): MacOS, AWS
• Are you willing to contribute it (Yes/No): Yes

Describe the feature and the current behavior/state.
tfx (1.0.0-rc0) currently depends on tensorflow-hub (>=0.9.0,<0.10)

I was wondering if we could update tensorflow-hub dependancy for tfx to allow tf-hub 0.12.0, so something like (>=0.9.0,<=0.12.0)?

I am not sure if that would break anything in tfx, but I am happy to investigate and contribute to this change

Will this change the current API? How?
No

Who will benefit with this feature?
tensorflow-hub has added some new features in 0.10.0 and beyond (specifically the one I'm interested in "compute_output_shape in hub.KerasLayer" which they added in 0.12.0). It would be cool to be able to take advantage of those while still being able to use tfx

Do you have a workaround or are completely blocked by this? :
Blocked

Name of your Organization (Optional)

Any Other info.

[chongkong]

Thanks @suryaavala. We missed to keep the dependency constraint up to date.

[suryaavala]

No worries @chongkong!

I've already opened a PR (#3813) with the issue to update the dependency. Looks like you might have missed it and created another one. Should I close mine in favour of yours?

[chongkong]

Oh sorry I missed your PR. Will use your's.