Pre-release of 0.1.9

Major change : Tensorflow 2.6 compatibility

This release is currently being tested and will be updated to be the latest version in PyPI soon, in the meantime users who need the fixes below can install this version directly from the wheels below, i.e. pip install tensorflow_decision_forests-0.1.9-cp39-cp39-manylinux_2_12_x86_64.manylinux2010_x86_64.whl for python 3.9.

Fixes

• Fix failure from Github Issue #45 where the wrong field was accessed for leaf node distributions.

• Fix incorrect handling of CART pruning when validation set is empty. Previously, the whole tree would be erroneously pruned. Now, pruning is disabled if the validation set is not specified.

• Fix saving of categorical features specification in the Builder.

• Migration to Tensorflow 2.6. You will see an undefined symbol error if you install this version with a TensorFlow version different than 2.6. Previous versions were compiled for TF 2.5.