Add Trove classifier for Python 3.8
@@ -60,6 +60,7 @@ https://pypng.readthedocs.io/en/latest/
'Programming Language :: Python :: 3.5',
'Programming Language :: Python :: 3.6',
'Programming Language :: Python :: 3.7',
+ 'Programming Language :: Python :: 3.8',
'License :: OSI Approved :: MIT License',
'Operating System :: OS Independent',
],
