include setuptools in lint_setup_py

Author: ohmayr

packages/google-resumable-media/noxfile.py

@@ -215,7 +215,7 @@ def lint(session):
 @nox.session(python=DEFAULT_PYTHON_VERSION)
 def lint_setup_py(session):
     """Verify that setup.py is valid (including RST check)."""
-    session.install("docutils", "Pygments")
+    session.install("setuptools", "docutils", "Pygments")
     session.run("python", "setup.py", "check", "--restructuredtext", "--strict")