release google-metrax 0.1.4 to pypi (#112)

Replace keras_nlp references with keras_hub (#97)

* Replace keras_nlp with keras_hub

keras_nlp was renamed to keras_hub (they're the same package):
https://github.com/keras-team/keras-nlp

* Update requirements.txt

---------

Co-authored-by: Jiwon Shin <[email protected]>

exclude test files from the release (#41)