ODSC-54710. Support Python versions up to 3.12

- install tf-keras for backward compatibility in transformers in py3.11+

Author: liudmylaru

.github/workflows/run-unittests-py39-py310.yml

@@ -28,6 +28,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+        # dask, which is used for tests and some use-cases incompatible with latest py3.11.9, py3.12.3 (https://github.com/dask/dask/issues/11038)
+        # to fix issues with dask, set python to "3.11.8", "3.12.2". Relax it to "3.11", "3.12" after issue with dask resolved
         python-version: ["3.11.8", "3.12.2"]
         name: ["unitary",
               # "slow_tests"

pyproject.toml

@@ -94,7 +94,10 @@ data = [
   "sqlalchemy>=1.4.1, <=1.4.46",
 ]
 geo = ["geopandas", "oracle_ads[viz]"]
-huggingface = ["transformers"]
+huggingface = [
+  "transformers",
+  "tf-keras; python_version>='3.11'"  # Keras 3 installed in py3.11+, but this is not yet supported in Transformers. Need to install the backwards-compatible tf-keras
+]
 notebook = ["ipython>=7.23.1, <8.0", "ipywidgets~=7.6.3"]
 onnx = [
   "lightgbm",