sysutils/zrepl: Update to 0.0.2
- Include UPDATING message about breaking changes in zrepl.yml
- Update dependencies to match Gopkg.lock changes [1]
- Take maintainership, approves by lifanov via email previously
[1] https://github.com/zrepl/zrepl/compare/0.0.1...0.0.2#files_bucket
Approved by: lifanov (maintainer)
Differential Revision: https://reviews.freebsd.org/D13163