Changes:
- https://github.com/tianon/docker-bash/commit/5e48786: Update devel to 20210315, commit 83c4ad27c7f1284ecb5db6e2f1afc0c553d5fcf3
- https://github.com/tianon/docker-bash/commit/8789b92: Fix Git version assumption
- https://github.com/tianon/docker-bash/commit/f045e71: Update "versions.sh" to be more forgiving about commit messages (and more strict about only updating once a week)
- https://github.com/tianon/docker-bash/commit/3ff1fb5: Update devel to 20210305, commit 11bf534f3628cc0a592866ee4f689beca473f548