Update django-debug-toolbar to 1.8

[pyup-bot]

There's a new version of django-debug-toolbar available.
You are currently using 1.7. I have updated it to 1.8

These links might come in handy: PyPI | Changelog | Repo

Changelog

1.8

---

This version is compatible with Django 1.11 and requires Django 1.8 or
later.

Features

• New decorator debug_toolbar.decorators.require_show_toolbar prevents
  unauthorized access to decorated views by checking SHOW_TOOLBAR_CALLBACK
  every request. Unauthorized access results in a 404.
• The SKIP_TEMPLATE_PREFIXES setting allows skipping templates in
  the templates panel. Template-based form widgets' templates are
  skipped by default to avoid panel sizes going into hundreds of
  megabytes of HTML.

Bugfixes

• All views are now decorated with
  debug_toolbar.decorators.require_show_toolbar preventing unauthorized
  access.
• The templates panel now reuses contexts' pretty printed version which
  makes the debug toolbar usable again with Django 1.11's template-based
  forms rendering.
• Long SQL statements are now forcibly wrapped to fit on the screen.

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖

[mention-bot]

@pyup-bot, thanks for your PR! By analyzing the history of the files in this pull request, we identified @ad-m to be a potential reviewer.

[coveralls]

Coverage remained the same at 82.541% when pulling 394f1ab on pyup-update-django-debug-toolbar-1.7-to-1.8 into 219a9ac on master.

[pyup-bot]

Closing this in favor of #115