Set version in setup.cfg

setup.cfg

@@ -1,4 +1,5 b''
 [metadata]
+version = attr: IPython.core.release.__version__
 license_file = LICENSE
 project_urls =
     Documentation = https://ipython.readthedocs.io/

setupbase.py

@@ -63,7 +63,6 b" execfile(pjoin(repo_root, 'IPython','core','release.py'), globals())"
 # This dict is eventually passed to setup after additional keys are added.
 setup_args = dict(
       name             = name,
-      version          = version,
       description      = description,
       long_description = long_description,
       author           = author,