Update setup.py

Author: mosfet80

setup.py

@@ -3,7 +3,7 @@
 
 
 install_requires = [
-    'importlib-metadata;python_version<"3.5"',
+    'importlib-metadata;python_version<"3.8"',
 ]
 package_excludes = ['tests*', 'docs*']
 packages = find_packages(exclude=package_excludes)
@@ -27,7 +27,7 @@
             'pytest',
         ],
     },
-    python_requires='>=3.8',
+    python_requires='>=3.5',
     zip_safe=True,
     author='William Woodall',
     author_email='william@osrfoundation.org',