Setup.py corrections

Author: malazay

setup.py

@@ -15,7 +15,7 @@
     packages=setuptools.find_packages(),
     classifiers=[
         "Programming Language :: Python :: 3",
-        "License :: OSI Approved :: MIT License",
+        "License :: OSI Approved :: GNU General Public License v3.0",
         "Operating System :: OS Independent",
     ],
     python_requires='>=3.7',