Django-comments-tree

New minor release thanks to Mandeep Gill with the following changes:

* Adds support for non-int based object_pk, for instead when using UUIDs or
HashIds as the primary key on a model (closes 112).
* Refactors the commentbox props generation into a separate function so can
be used from the webapi for use with rest_framework/API-only backends that
don't make use of server-side templates.
* Adds a pyproject.yaml for use with `poetry` (https://poetry.eustace.io)
and new pip environments (PEP 518).

* Fixes issue 116.
* Updates package.json JavaScript dependencies:
* babel-cli from 6.24.1 to 6.26.0.
* jquery from 3.2.1 to 3.3.1.

* Upgrades Twitter-Bootstrap from v3 to v4.
* Fixes issue with tutorial fixtures (bug 114).
* Upgrade all JavaScript dependencies. Check packages.json for details.
The major changes are:
* ReactJS updates from 15.5 to 16.5.
* Babel updates from 6 to 7.
* Webpack from 2.4.1 to 4.21.0.
* Bootstrap from 3.3.7 to 4.1.3.
* Updates webpack.config.js.
* Demo sites and tutorial have been adapted to Twitter Bootstrap v4.
* Fixes issues 94, 108, 111.

* Resolves deprecation warnings and adopt recommendations in unit tests.
* Fixes demo sites so that they work with Django 1.11, Django 2.0 and
Django 2.1.

* Adds support for Django 2.1.
* Drops support for Django < 1.11 as it depends on django-contrib-comments
which dropped support too.
* Fixes issue 104 (on lack of Django 2.1 support).

* Fixes issues 76, 86 and 87.
* Request user name and/or email address in case the user is logged
in but the user's email attribute is empty and/or the user's
get_full_name() method returns an empty string.