Upperbound tf to 2.16 because of keras 3 and transformers compatibility

setup.py

@@ -17,13 +17,15 @@ def readme():
         'numba>=0.50.0, !=0.54.0, <0.60.0',  # Avoid 0.54 due to: https://github.com/SeldonIO/alibi/issues/466
     ],
 
-    'tensorflow': ['tensorflow>=2.0.0, !=2.6.0, !=2.6.1, <2.19.0'],
+    # `keras 3` becomes the default for `tensorflow >= 2.16.0``
+    # which is not yet supported by `transformers`
+    'tensorflow': ['tensorflow>=2.0.0, !=2.6.0, !=2.6.1, <2.16.0'],
     'torch': ['torch>=1.9.0, <3.0.0'],
     'all': [
         'ray>=0.8.7, <3.0.0',
         'shap>=0.40.0, <0.44.0',
         'numba>=0.50.0, !=0.54.0, <0.60.0',
-        'tensorflow>=2.0.0, !=2.6.0, !=2.6.1, <2.19.0',
+        'tensorflow>=2.0.0, !=2.6.0, !=2.6.1, <2.16.0',
         'torch>=1.9.0, <3.0.0'
     ]
 }