Graph is from latest (1.19 released) to oldest (1.18 released).

4 branches are shown: master, dev-1.19, release-1.18, dev-1.20.

• 'master' is always https://kubernetes.io
• 'dev-1.19' contains 1.19 enhancement docs and is never published
• 'release-1.18' is the last commit before a new release (https://v1-18.docs.kubernetes.io)
• 'dev-1.20' contains 1.20 enhancement docs and is never published