This release adds support for updating PRs from forks that allow maintainers to update the PR
It is done via git rather than via GitHub's API, and therefore has a different behavior than updating local branches
Breaking changes
The tokens have changed. PAT was replaced with UPDATE_BRANCH_PAT and UPDATE_FORK_PAT which are used for updating same-repo branches and fork branches respectively.
UPDATE_BRANCH_PAT can be a GitHub App token, but UPDATE_FORK_PAT must be a user PAT.
You can disable updating fork branches by setting update-requires-source to branch