Unihan-etl

- 230 Move packaging / publishing to poetry
- 229 Self host docs
- 229 Add metadata / icons / etc. for doc site
- 229 Move travis -> github actions
- 229 Overhaul Makefiles

- Update CHANGES headings to produce working links
- Relax `appdirs` version constraint
- 228 Move from Pipfile to poetry

- Fix flicker in download progress bar

- Add `project_urls` to setup.py
- Use plain reStructuredText for CHANGES
- Use `collections` that's compatible with python 2 and 3
- PEP8 tweaks

- Add code links in API
- Add `__version__` to `unihan_etl`

- 91 New fields from UNIHAN
[Revision 25](https://www.unicode.org/reports/tr38/tr38-25.html).

- kJinmeiyoKanji
- kJoyoKanji
- kKoreanEducationHanja
- kKoreanName
- kTGH

UNIHAN Revision 25 was released 2018-05-18 and issued for Unicode **11.0**:

- Add tests and example corpus for kCCCII
- Add configuration / make tests for isort, flake8
- Switch tmuxp config to use pipenv
- Add _Pipfile_
- Add `make sync_pipfile` task to sync _requirements/_.txt* files
with *Pipfile\*
- Update and sync Pipfile
- Developer package updates (linting / docs / testing)

- isort 4.2.15 to 4.3.4
- flake8 3.3.0 to 3.5.0
- vulture 0.14 to 0.27
- sphinx 1.6.2 to 1.7.6
- alagitpull 0.0.12 to 0.0.21