Merge pull request #2437 from deepchem/release

### Stable version

Please install tensorflow v2.3.* before installing deepchem.

Please install tensorflow ~2.4 before installing deepchem.

```bash

pip install tensorflow==2.3.*

pip install tensorflow~=2.4

```

Then, you install deepchem via pip or conda.  

The nightly version is built by the HEAD of DeepChem.

```bash

pip install tensorflow==2.3.*

pip install tensorflow~=2.4

pip install --pre deepchem

```

"""

# If you push the tag, please remove `.dev`

__version__ = '2.5.0.dev'

__version__ = '2.5.0'

import deepchem.data

import deepchem.feat

    conda create -y --name deepchem python=3.6 && \

    . /miniconda/etc/profile.d/conda.sh && \

    conda activate deepchem && \

    pip install tensorflow==2.3.* deepchem && \

    pip install tensorflow~=2.4 deepchem && \

    conda install -c conda-forge rdkit && \

    conda clean -afy && \

    rm -rf ~/.cache/pip

Stable version

--------------

Please install tensorflow v2.3.* before installing deepchem.

Please install tensorflow ~2.4 before installing deepchem.

.. code-block:: bash

    pip install tensorflow==2.3.*

    pip install tensorflow~=2.4

Then, you install deepchem via pip or conda.  

.. code-block:: bash

    pip install tensorflow==2.3.*

    pip install tensorflow~=2.4

    pip install --pre deepchem

.. code-block:: bash

    pip install tensorflow==2.3.*

    pip install tensorflow~=2.4

    pip install --pre deepchem

    conda install -y -c conda-forge rdkit