Add pytest config and update to python 3.8

Author: infmagic2047

pytest.ini

@@ -0,0 +1,2 @@
+[pytest]
+testpaths = tests

setup.py

@@ -32,8 +32,7 @@ def get_version():
         'License :: OSI Approved :: MIT License',
         'Operating System :: POSIX :: Linux',
         'Programming Language :: Python :: 3 :: Only',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.8',
         'Topic :: Education',
     ],
     packages=find_packages(exclude=['tests*']),