Remove declared support for Python 3.5

setup.py

@@ -25,8 +25,7 @@ setup(
     classifiers=[
         "Development Status :: 3 - Alpha",
         "Intended Audience :: Developers",
-        "Topic :: Software Development",
-        "Programming Language :: Python :: 3.5",
+        "Topic :: Software Development",        
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",