Update raven to 5.32.0

[pyup-bot]

There's a new version of raven available.
You are currently using 5.26.0. I have updated it to 5.32.0

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

Changelog

5.32.0

---

• Made raven python breadcrumb patches work when librato monkey
  patches logging.

5.31.0

---

• Improved fix for the Django middleware regression.

5.30.0

---

• Keep the original type for the django middleware settings if we
  change them.

5.29.0

---

• Added register_logging_handler.
• Removed bad mixin from django's WSGI middleware
• Removed "support for extracing data from rest_framework" because
  this broke code.

5.28.0

---

• Corrected an issue that caused close() on WSGI iterables to not be
  correctly called.
• Fixes the new Django 1.10 MIDDLEWARE_CLASSES warning.

5.27.1

---

• Bugfix for transaction based culprits.

5.27.0

---

• Added support for extracting data from rest_framework in Django integration
• Updated CA bundle.
• Added transaction-based culprits for Celery, Django, and Flask.
• Fixed an issue where ignore_exceptions wasn't respected.

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

Happy merging! 🤖

[pyup-bot]

Closing this in favor of #178