Factored from https://github.com/denoland/deno/pull/25123.
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Signed-off-by: David Sherret <dsherret@users.noreply.github.com>
Co-authored-by: David Sherret <dsherret@gmail.com>
Co-authored-by: David Sherret <dsherret@users.noreply.github.com>
This commits add a CI script that allows to promote a certain
canary build to a "Release Candidate" release.
This is done using `libsui` and `patchver` utilities.