Add python version requirement metadata

hukkinj1 · 1st1 · commit 090f0e7c9324 · 2020-05-13T11:38:40.000-07:00
diff --git a/setup.py b/setup.py
@@ -50,6 +50,7 @@
     version=VERSION,
     description='Immutable Collections',
     long_description=readme,
+    python_requires='>=3.5',
     classifiers=[
         'License :: OSI Approved :: Apache Software License',
         'Intended Audience :: Developers',
