Update PyPI package to pytesseract v0.3.9

[bozhodimitrov]

Hi @madmaze
Please update whenever you have time. Thanks in advance!

[johnthagen]

Also, wheels .whl files are missing from PyPI: https://pypi.org/project/pytesseract/0.3.8/#files

Read more about the advantages of wheels to understand why generating wheel distributions are important.

To create a wheel along with source distribution:

(venv) $ pip install --upgrade pip setuptools wheel
(venv) $ python setup.py sdist bdist_wheel

# See dist/*.whl

To upload wheels:

(venv) $ pip install twine
(venv) $ twine upload dist/*

[johnthagen]

#413 will make the generated wheel files appropriately Python 3-only marked.

[madmaze]

Done, thanks @int3l and I did also upload a bdist, thanks @johnthagen!