Update release date to today.

Nurdok · Nurdok · commit e5c42372f3ad · 2019-12-09T09:01:40.000+02:00
diff --git a/docs/release_notes.rst b/docs/release_notes.rst
@@ -4,8 +4,8 @@ Release Notes
 **pydocstyle** version numbers follow the
 `Semantic Versioning <http://semver.org/>`_ specification.
 
-Current Development Version
----------------------------
+5.0.0 - December 9th, 2019
+--------------------------
 
 Major Updates
 
