This will help keep the ElectrumABC github repo up to date, which is needed because we need to push tags there to host the releases.
Note that the process did not remove the files that were removed in the `[electrum] initial monorepo integration` commit (cirrus.yml, pre-commit-config.yaml...). This will have to be done by pushing a commit to the github repo, but I don't anticipate it causing any future conflict.