hacking: release 5.0.0

This has dropped support for Python 3.6 and 3.7 since the last
release, hence the version jump.

Change-Id: I60c615fd80a8fb8fbf824e7a78c40d4c387cdbc1

deliverables/_independent/hacking.yaml

@@ -148,5 +148,9 @@ releases:
     projects:
       - repo: openstack/hacking
         hash: dfb09fb05515bdcbd60c3798c995a442d1e6b8df
+  - version: 5.0.0
+    projects:
+      - repo: openstack/hacking
+        hash: 2931131b69af7f1e76d8ab506c250a94b330ffb9
 repository-settings:
   openstack/hacking: {}