Log Message:
py-pygit2: update to 0.27.2.

0.27.2 (2018-09-16)
-------------------------

- Add support for Python 3.7
  `#809 <https://github.com/libgit2/pygit2/issues/809>`_

- New ``Object.short_id``
  `#799 <https://github.com/libgit2/pygit2/issues/799>`_
  `#806 <https://github.com/libgit2/pygit2/pull/806>`_
  `#807 <https://github.com/libgit2/pygit2/pull/807>`_

- New ``Repository.descendant_of`` and ``Repository.branches.with_commit``
  `#815 <https://github.com/libgit2/pygit2/issues/815>`_
  `#816 <https://github.com/libgit2/pygit2/pull/816>`_

- Fix repository initialization in ``clone_repository(...)``
  `#818 <https://github.com/libgit2/pygit2/issues/818>`_

- Fix several warnings and errors, commits
  `cd896ddc <https://github.com/libgit2/pygit2/commit/cd896ddc>`_
  and
  `dfa536a3 <https://github.com/libgit2/pygit2/commit/dfa536a3>`_

- Documentation fixes and improvements
  `#805 <https://github.com/libgit2/pygit2/pull/805>`_
  `#808 <https://github.com/libgit2/pygit2/pull/808>`_

0.27.1 (2018-06-02)
-------------------------

Breaking changes:

- Now ``discover_repository`` returns ``None`` if repository not found, instead
  of raising ``KeyError``
  `#531 <https://github.com/libgit2/pygit2/issues/531>`_

Other changes:

- New ``DiffLine.raw_content``
  `#610 <https://github.com/libgit2/pygit2/issues/610>`_

- Fix tests failing in some cases
  `#795 <https://github.com/libgit2/pygit2/issues/795>`_

- Automatize wheels upload to pypi
  `#563 <https://github.com/libgit2/pygit2/issues/563>`_