Drop CHANGES.rst in favor of GitHub Releases (#198)

Author: macnewbold

CHANGES.rst

@@ -11,7 +11,7 @@ long_description_content_type = text/x-rst
 keywords = flask, debug, toolbar
 url = https://github.com/pallets-eco/flask-debugtoolbar
 project_urls =
-    Changelog = https://github.com/pallets-eco/flask-debugtoolbar/blob/master/CHANGES.rst
+    Changelog = https://github.com/pallets-eco/flask-debugtoolbar/releases
     Documentation = https://flask-debugtoolbar.readthedocs.io/
 classifiers =
     Development Status :: 4 - Beta