Update opbeat to 3.5.2

[pyup-bot]

There's a new version of opbeat available.
You are currently using 3.4.0. I have updated it to 3.5.2

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

Changelog

3.5.2

• Fixed a threading bug (144, thanks rossgray for the report)
• Fixed a bug when handling DisallowedHost exceptions in Django 1.9+
  (143, thanks blueyed for the report and patch)

3.5.1

• Fixed two bugs related to SQL parsing that could cause an IndexError.

3.5

• Switched to urllib3 as default transport. This means that opbeat_python
  now requires both urllib3 and certifi
• Added support for PyMongo/MongoDB instrumentation
• Added support for Twisted LogObservers, thanks slav0nic
• fixed several bugs in dbapi2 instrumentation

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 #41