Update setup.py

Author: mosfet80

setup.py

@@ -27,7 +27,7 @@
             'pytest',
         ],
     },
-    python_requires='>=3.5',
+    python_requires='>=3.8',
     zip_safe=True,
     author='William Woodall',
     author_email='william@osrfoundation.org',
@@ -42,9 +42,4 @@
     description="Commonly needed Python modules, "
                 "used by Python software developed at OSRF",
     license='Apache 2.0',
-    extras_require={
-        'test': [
-            'tests',
-        ],
-    },
 )