Django-debug-toolbar

----------------

* Changed the Travis CI matrix to run style checks first.
* Exposed the ``djdt.init`` function too.
* Small improvements to the code to take advantage of newer Django APIs
and avoid warnings because of deprecated code.
* Verified compatibility with the upcoming Django 3.0 (at the time of
writing).

----------------

* Updated :class:`~debug_toolbar.panels.staticfiles.StaticFilesPanel` to be
compatible with Django 3.0.
* The :class:`~debug_toolbar.panels.profiling.ProfilingPanel` is now enabled
but inactive by default.
* Fixed toggling of table rows in the profiling panel UI.
* The :class:`~debug_toolbar.panels.profiling.ProfilingPanel` no longer skips
remaining panels or middlewares.
* Improved the installation documentation.
* Fixed a possible crash in the template panel.
* Added support for psycopg2 ``Composed`` objects.
* Changed the Jinja2 tests to use Django's own Jinja2 template backend.
* Added instrumentation to queries using server side cursors.
* Too many small improvements and cleanups to list them all.

**Backwards incompatible changes**
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Removed support for Python 2.
* Removed support for Django's deprecated ``MIDDLEWARE_CLASSES`` setting.
* Restructured :class:`debug_toolbar.panels.Panel` to execute more like the
new-style Django MIDDLEWARE. The ``Panel.__init__()`` method is now passed
``get_response`` as the first positional argument. The
:meth:`debug_toolbar.panels.Panel.process_request` method must now always
return a response. Usually this is the response returned by
``get_response()`` but the panel may also return a different response as is
the case in the :class:`~debug_toolbar.panels.redirects.RedirectsPanel`.
Third party panels must adjust to this new architecture.
``Panel.process_response()`` and ``Panel.process_view()`` have been removed
as a result of this change.

The deprecated API, ``debug_toolbar.panels.DebugPanel``, has been removed.
Third party panels should use :class:`debug_toolbar.panels.Panel` instead.

The following deprecated settings have been removed:

* ``HIDDEN_STACKTRACE_MODULES``
* ``HIDE_DJANGO_SQL``
* ``INTERCEPT_REDIRECTS``
* ``RESULTS_STORE_SIZE``
* ``ROOT_TAG_ATTRS``
* ``TAG``

-----------------

* Use ``defer`` on all ``<script>`` tags to avoid blocking HTML parsing,
removed inline JavaScript.
* Stop inlining images in CSS to avoid Content Security Policy errors
altogether.
* Reformatted the code using `black <https://github.com/ambv/black>`__.
* Added the Django mail panel to the list of third-party panels.
* Convert system check errors to warnings to accommodate exotic
configurations.
* Fixed a crash when explaining raw querysets.
* Fixed an obscure Unicode error with binary data fields.
* Added MariaDB and Python 3.7 builds to the CI.

-------------------

* Fixed a problem where the duplicate query detection breaks for
unhashable query parameters.
* Added support for structured types when recording SQL.
* Made Travis CI also run one test no PostgreSQL.
* Added fallbacks for inline images in CSS.
* Improved cross-browser compatibility around ``URLSearchParams`` usage.
* Fixed a few typos and redundancies in the documentation, removed
mentions of django-debug-toolbar's jQuery which aren't accurate
anymore.

-----------------

* Removed support for Django < 1.11.
* Added support and testing for Django 2.1 and Python 3.7. No actual code
changes were required.
* Removed the jQuery dependency. This means that django-debug-toolbar
now requires modern browsers with support for ``fetch``, ``classList``
etc. The ``JQUERY_URL`` setting is also removed because it isn't
necessary anymore. If you depend on jQuery, integrate it yourself.
* Added support for the server timing header.
* Added a differentiation between similar and duplicate queries. Similar
queries are what duplicate queries used to be (same SQL, different
parameters).
* Stopped hiding frames from Django's contrib apps in stacktraces by
default.
* Lots of small cleanups and bug fixes.

------------------

* Fix erroneous ``ContentNotRenderedError`` raised by the redirects panel.