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Heroku CLI version 8.1.1

Change effective on 27 April 2023

Heroku CLI version 8.1.1 includes the following change:

FIX: Update version of @oclif/plugin-plugins dependency
- Updates the version of @oclif/plugin-plugins to a version that includes a fix for an issue with installing some CLI plugins.

The Heroku CLI keeps itself and its plugins, except linked plugins, automatically updated unless you installed the CLI using the Debian/Ubuntu package or npm install.

Ruby versions 2.7.8 and 3.0.6 are removed from the heroku-22 stack Announcing Auto Explain for Heroku Postgres