Update setup.py

Author: sahildari

Path Manipulation/Path Manipulation while File Upload/python/setup.py

@@ -15,7 +15,7 @@
     url="https://github.com/sahildari/secure-coding-examples",
     author='Sahil Dari',
     author_email="[email protected]",
-    license='GPL',
+    license='GPLv3',
     classifiers=[
         "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
         "Programming Language :: Python :: 3",