0.8.0

• Feature: allow reference repository in git clone #129
• Feature: add new stable/master tags for docker images #142
• Fix: fix TypeError when fetching source project #122
• Fix: handle CI status 'skipped' #127
• Fix: handle merging when source branch is master #127
• Fix: handle error on pushing to protected branches #127
• Enhancement: add appropriate error if unresolved discussions on merge request #136
• Enhancement: ensure reviewer and commit author aren't the same #137