Django-admin-toolbox

What's Changed
* fixes python version requirement syntax for poetry by originell in https://github.com/gbdlin/django-admin-toolbox/pull/10

New Contributors
* originell made their first contribution in https://github.com/gbdlin/django-admin-toolbox/pull/10

**Full Changelog**: https://github.com/gbdlin/django-admin-toolbox/compare/v1.0.0.dev28...v1.0.0.dev29

- Added ability to choose which sidebar should be rendered (defaults to
`default` by specifying `toolbox_sidebar_name` context variable.

- On Django 2.1, `admin_static` was deprecated and removed in Django 3.0
in favor of plain `static`. This change is backwards compatible with
Django 2.0 and Django 1.11, as it was already just an alias for
`static` on those versions of Django.
- Added missing admin RWD styles introduced in Django 2.0. This change
may introduce some 404 errors on Django 1.11, as those stylesheet
files are not present on this Django version. If this is an issue,
create `admin/base_site.html` template being an exact copy of original
Django `admin/base_site.html` template and add empty `responsive`
block into it.
- Reverted indentation and HTML tags ending style of customized
`admin/base.html` file to match original Django file. This makes
spotting any changes of this file in new Django versions easier.

- Changed attribute in model.Meta to fetch model icon.

- Fixed regression on font awesome icons not loading.

- Added warning about current instability of this project.
- Fixed breadcrumbs displaying on login page. Added option to re-enable it.
- Added option to disable breadcrumbs alltogether if requirements are not met.
- Bumped font-awesome version to 5.9.0. It is not possible yet to use any other subclass than fa, but v4 compatibility
shim is active
- Documented breadcrumbs.