Update git-bug to version 0.8.0 / rev 3 via SR 1036978
    
    https://build.opensuse.org/request/show/1036978
    by user mcepl + dimstar_suse
    - Update to 0.8.0:
      - More than 800 commits and a long long time after, git-bug
        v0.8.0 is now available.
      - Once again, this release represent a push towards making
        git-bug generally useful and correct. The two main
        improvements are a new Entity framework and write-capable
        WebUI.
      - Breaking changes(openSUSE package is much closer to this
        release)
        - changes in the data model makes it a requirement to use the
          migration tool to to update any previous repo.
        - remove the legacy identities that were directly embedded in
          bugs
      - Core
        - introduce a reusable entity package capable of handling
          all the complex operations of an Entity (bug, board,
          config ...): operations, DAG manipulation, conflict merge,
          signature, integrity ... to gre