Update django-floppyforms to 1.9.0

[pyup-bot]

This PR updates django-floppyforms from 1.7.0 to 1.9.0.

Changelog

1.9.0

~~~~~

This release changes the compatibility matrix for the project.

We now support the following Django releases:
- Django 2.2
- Django 3.0

We are also testing under the following Python versions:
- Python 3.6
- Python 3.7
- Python 3.8


No other significant changes in this release, but Django 1.11 and 2.1
are no longer supported.

1.8.0

~~~~~

This is the first release to be done under the Jazzband organization.

It collects several compatibility fixes to support Django 1.11 and 2.1.

The currently tested versions of `django-floppyforms` is now:
- Django 1.11 and Python 2.7 or 3.6
- Django 2.1 and Python 3.6

In principle, we want to support any reasonable combination of Django and Python that still receives security releases, so if you are using an untested combination and hit an issue, bug reports are welcome.

*Breaking Change*:

Because Django's widgets now render through a form-specific template renderer, but `floppyforms` widgets
use the standard rendering template (that doesn't automatically include Django's form templates), it is
recommended to manuallyput Django's form template directory directly into your own template backend
configuration.

If you don't add the following, you might experience issues mixing and matching vanilla widgets with
floppyform widgets::

 import django

 TEMPLATES = [
     {
         'BACKEND': 'django.template.backends.django.DjangoTemplates',
         'DIRS': [
             ...,  your other template directories
              django's own form template directories
             os.path.join(os.path.dirname(django.__file__), "forms/templates/",
         ],
         ...
     },
     ...
 ]


* `176`_: Fix HTML validation for hidden textarea used with GIS widgets.
* `191`_ + `196`_ + `209`_: Support for Django 1.11 and 2.1. Thanks to MrJmad and dryice for patches.
* `194`_: Remove official support for Python 2.6 and Python 3.2.
* `204`_: Use HTTPS for OpenStreetMap links. Thanks to dryice for the patch.

.. _176: https://github.com/jazzband/django-floppyforms/issues/176
.. _191: https://github.com/jazzband/django-floppyforms/pull/191
.. _194: https://github.com/jazzband/django-floppyforms/pull/194
.. _204: https://github.com/jazzband/django-floppyforms/pull/204
.. _196: https://github.com/jazzband/django-floppyforms/pull/196
.. _209: https://github.com/jazzband/django-floppyforms/pull/209

Links

• PyPI: https://pypi.org/project/django-floppyforms
• Changelog: https://pyup.io/changelogs/django-floppyforms/
• Repo: https://github.com/jazzband/django-floppyforms