Log Message:
py-pygit2: Update to 1.1.0

1.1.0 (2020-03-01)
-------------------------

- Upgrade to libgit2 0.99
  `#959 <https://github.com/libgit2/pygit2/pull/959>`_

- Continued work on custom odb backends
  `#948 <https://github.com/libgit2/pygit2/pull/948>`_

- New ``Diff.patchid`` getter
  `#960 <https://github.com/libgit2/pygit2/pull/960>`_
  `#877 <https://github.com/libgit2/pygit2/issues/877>`_

- New ``settings.disable_pack_keep_file_checks(...)``
  `#908 <https://github.com/libgit2/pygit2/pull/908>`_

- New ``GIT_DIFF_`` and ``GIT_DELTA_`` constants
  `#738 <https://github.com/libgit2/pygit2/issues/738>`_

- Fix crash in iteration of config entries
  `#970 <https://github.com/libgit2/pygit2/issues/970>`_

- Travis: fix printing features when building Linux wheels
  `#977 <https://github.com/libgit2/pygit2/pull/977>`_

- Move ``_pygit2`` to ``pygit2._pygit2``
  `#978 <https://github.com/libgit2/pygit2/pull/978>`_

Requirements changes:

- Now libgit2 0.99 is required
- New requirement: cached-property

Breaking changes:

- In the rare case you're directly importing the low level ``_pygit2``, the
  import has changed::

    # Before
    import _pygit2

    # Now
    from pygit2 import _pygit2