Bump up tensorflow from 2.2.0 to 2.3.0

conda/bob-devel/conda create -n xuxa2 -d python==3.7 boo.yml

+mamba create -n xuxa2 -d python=3.6 boost \
+click  \
+click-plugins \
+cmake \
+coverage  \
+dask  \
+dask-jobqueue \
+dask-ml \
+distributed \
+docker-py \
+docopt \
+ffmpeg \
+freetype \
+giflib \
+h5py \
+hdf5 \
+jinja2 \
+jpeg \
+jsonschema \
+libblitz \
+libpng \
+libsvm \
+libtiff \
+make \
+matplotlib \
+mkl \
+ncurses \
+nose \
+numpy \
+pandas \
+pillow \
+pkg-config \
+psycopg2 \
+pybind11 \
+pyopengl \
+pyqtgraph \
+pytest \
+pytest-cov \
+python-graphviz \
+pytorch \
+pyyaml \
+pyzmq \
+qdarkstyle \
+qtpy \
+requests \
+schema \
+scikit-image \
+scikit-learn \
+scipy \
+setuptools \
+simplejson \
+sox \
+sphinx \
+sphinx_rtd_theme \
+sphinxcontrib-httpdomain \
+sphinxcontrib-programoutput \
+sqlalchemy \
+tabulate \
+tensorflow==2.2.0 \
+termcolor \
+torchvision \
+tqdm \
+vlfeat \
+xarray \
+zc.buildout \
+zc.recipe.egg
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