Coltrane

- Bump `rich-click` dependency and slightly better command aliases support.

- Parse JSON5 data as UTF-8.

- Add `pubdate` to RSS feed [61](https://github.com/adamghill/coltrane/pull/61) by [Tobi-De](https://github.com/Tobi-De).
- Support setting a custom `TIME_ZONE`.

- Create example `Dockerfile` and `gunicorn.conf.py` files for easier deployments of `coltrane` apps.
- [Add the ability](installation.mdjson5) to use [JSON5](https://json5.org) for data files.

_Breaking changes_

- Remove loading `data.json`. All data should be in JSON files in the `data` directory.
- The default markdown renderer is now `mistune` instead of `markdown2`. The next version of `coltrane` will remove the option to use `markdown2`.

- Add `COLTRANE_IS_SECURE` [env variable](env.mdcoltrane_is_secure).
- Add `django.middleware.gzip.GZipMiddleware`, `django.middleware.http.ConditionalGetMiddleware`, `django.middleware.csrf.CsrfViewMiddleware` middlewares.

- [`django-unicorn`](https://www.django-unicorn.com) integration.
- Fix: Passing `INSTALLED_APPS` into `init` now does not override the default apps.