Jikanpy

Fixed

- Don't include the CHANGELOG.md as a `data_file`, just read it while building releases. Previously this could cause CHANGELOG.md to be installed into the users data dir (`/usr/` or `~/.local/` depending on how its installed). See [90](https://github.com/abhinavk99/jikanpy/issues/90)

Changed

- Updated aiohttp to 3.7.4

Added

- Calling season method with no arguments defaults to current season

Fixed

- Bug where downloading jikanpy from the distribution would fail because CHANGELOG.md wasn't included and setup.py uses it

Fixed

- Bug where simplejson wasn't being installed as a dependency

Added

- Revamped how APIException works so it displays more information whether or not the HTTP response is JSON

Changed

- Some refactoring to fix typing and linting errors from mypy, flake8, and pylint
- Updated some unit tests and commented out ones that don't work because of Jikan 503 errors

Fixed

- Bug where jikanpy would crash when the JSON response can't be decoded with the simplejson JSON parser
- Bug where jikanpy would crash when the JSON response is a list instead of a dict