Libvcs

- 295: Checkout remote branch before git rebase. Thank you jensens!
- 293: Fix revision handling with pip-urls. Thank you jensens!
- 279: Update poetry to 1.1
- CI: Use poetry 1.1.7 and `install-poetry.py` installer
- Relock poetry.lock at 1.1 (w/ 1.1.7's fix)

- 311: Convert to markdown

Generally speaking, refactor / magic is in the process of being stripped out in the next few
releases. The API is subject to change significantly in pre-1.0 builds.

[271]:

- Big version bump (0.5 -> 0.9)
- Remove Python 2.7 support
- Add annotations
- Change `libvcs.git.GitRepo.status()` to return `GitStatus` named tuple
- Breaking change: Repo objects now require `repo_dir` to be passed
- Update black to 21.6b0

[271]: https://github.com/vcs-python/libvcs/pull/271

- [refactor] [267] overhaul docs

- Move sphinx api format to Numpy-style

- Move from reStructuredText to Markdown (via recommonmark). The master plan is to eliminate
docutils and sphinx as a bottleneck completely in favor of something else (e.g., gatsby with a
source that inspects our modules and can source intersphinx)

- Move from RTD to GitHub Action, full support of poetry extras packages, deploys straight to S3
and CloudFront

- [270] Build and publish packages via poetry
- [270] Overhaul development docs

[270]: https://github.com/vcs-python/libvcs/pull/270
[267]: https://github.com/vcs-python/libvcs/pull/267

- [268] `libvcs.base.BaseRepo`:
- no longer sets `**kwargs` to dictionary on the object
- remove `__slot__` and rename `name` attribute to `repo_name`

[268]: https://github.com/vcs-python/libvcs/pull/268

- \[bug\] `libvcs.git.extract_status()` Fix issue capturing branch names with special characters