Log Message:
(devel/R-gert) Updated 1.3.2 to 1.6.0  (make test fails)

1.6.0
  - We recommend at least libgit2 1.0 now
  - Windows: update to libgit2 1.4.2
  - Tests: switch to ECDSA keys for ssh remote unit tests
  - git_log() gains a parameter 'after'

1.5.0
  - Windows: use ${HOMEDRIVE}${HOMEPATH} path as home if it exists, to match
    git-for-windows. On most systems this is the same as ${USERPROFILE}.
  - git_commit_info() no longer includes $diff by default because it can be huge.
    Please use git_diff() instead if you need it.

1.4.3
  - Fix a unit test for some older versions of libgit2

1.4.2
  - Make unit tests more robust against network fail and renamed branches
  - Windows / MacOS: update to libgit2 1.3.0

1.4.1
  - Fix compile error with some older version of libgit2
  - MacOS: automatically use static libs when building in CI

1.4.0
  - Windows / MacOS: update to libgit2 1.2.0
  - New function git_branch_move()
  - git_branch_checkout gains 'orphan' parameter