Fixes #472: Specify Python 3.8 support in setup.py

setup.py

@@ -72,6 +72,7 @@ def test_suite():
     'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
     'Programming Language :: Python :: 3.7',
+    'Programming Language :: Python :: 3.8',
     'Programming Language :: Python :: Implementation :: PyPy',
     'Topic :: Software Development :: Libraries',
     'Topic :: Database'
@@ -105,8 +106,8 @@ def test_suite():
 
 if __name__ == "__main__":
     pv = sys.version_info[:2]
-    if pv not in ((2, 7), (3, 3), (3, 4), (3, 5), (3, 6), (3, 7)):
-        s = "Sorry, but %s %s requires Python of one of the following versions: 2.7, 3.3-3.7." \
+    if pv not in ((2, 7), (3, 3), (3, 4), (3, 5), (3, 6), (3, 7), (3, 8)):
+        s = "Sorry, but %s %s requires Python of one of the following versions: 2.7, 3.3-3.8." \
             " You have version %s"
         print(s % (name, version, sys.version.split(' ', 1)[0]))
         sys.exit(1)