Support python 2 parsing

Signed-off-by: Dan Ryan <dan@danryan.co>

pipenv/vendor/requirementslib/models/setup_info.py

@@ -221,19 +221,22 @@ class SetupInfo(object):
     def run_setup(self):
         if self.setup_py is not None and self.setup_py.exists():
             with cd(self.setup_py.parent), _suppress_distutils_logs():
-                from setuptools.dist import distutils
-                save_argv = sys.argv.copy()
-                try:
+                if sys.version_info < (3, 5):
+                    save_argv = sys.argv[:]
+                else:
+                    save_argv = sys.argv.copy()
                 # This is for you, Hynek
                 # see https://github.com/hynek/environ_config/blob/69b1c8a/setup.py
+                try:
                     global _setup_distribution, _setup_stop_after
                     _setup_stop_after = "run"
                     script_name = self.setup_py.as_posix()
                     g = {"__file__": script_name, "__name__": "__main__"}
+                    l = {}
                     sys.argv[0] = script_name
                     sys.argv[1:] = ["egg_info", "--egg-base", self.base_dir]
                     with open(script_name, 'rb') as f:
-                        exec(f.read(), g)
+                        exec(f.read(), g, l)
                 finally:
                     _setup_stop_after = None
                     sys.argv = save_argv