Log Message:
Update to 1.5.0. From the changelog:

- Less noisy output: Only show number of unpushed commits in output if
  there are more than 0.
- Add experimental command `mob squash-wip` to squash any WIP commits in
  the wip branch into a following manual commit using `git rebase
  --interactive` with `mob` as the temporary `GIT_EDITOR`.
- The order of the latest commit is now reversed, the latest one is
  shown last.
- Add experimental configuration option `MOB_WIP_BRANCH_PREFIX` to
  configure the `mob/` prefix to some other value.