The first release of the Node.js buildpack after 2020-06-04 will no longer include Node.js versions 13.x. These Node.js versions will no longer be supported upstream. Please migrate your Node.js apps to supported versions of Node.js before that time.
As always, the buildpacks team is happy to answer questions you may have about this deprecation in the #buildpacks Slack channel.
Kashyap Vedurmudi, Buildpacks PM