Use find_packages() in setup.py ; Increase PyPI version to v0.5.2

setup.py

@@ -2,20 +2,21 @@
 
 # noinspection PyUnresolvedReferences
 import setuptools
+from setuptools import find_packages
 
 setup(
     name='puissance4',
-    packages=['puissance4'],
+    packages=find_packages(),
     install_requires=[
     ],
-    version='0.5.1',
+    version='0.5.2',
     description='Artificial Intelligence for the game Connect Four on PyPI',
     long_description='Artificial Intelligence for Puissance-4/Connect-4, based on "Upper Confidence bounds for Trees".',
     long_description_content_type='text/x-rst',
     author='Wok',
     author_email='wok@tuta.io',
     url='https://github.com/woctezuma/puissance4',
-    download_url='https://github.com/woctezuma/puissance4/archive/0.5.1.tar.gz',
+    download_url='https://github.com/woctezuma/puissance4/archive/0.5.2.tar.gz',
     keywords=['puissance4', 'puissance-4', 'connect4', 'connect-4', 'connect-four', 'artificial intelligence', 'UCT'],
     classifiers=[
         'Topic :: Games/Entertainment',