Release Notes:
* Bump peter-evans/create-pull-request from v3.5.1 to v3.7.0 ([318](https://github.com/dropbox/dropbox-sdk-python/pull/318))
* Automated Spec Update ([317](https://github.com/dropbox/dropbox-sdk-python/pull/317))
* Bump codecov/codecov-action from v1.0.15 to v1.2.1 ([315](https://github.com/dropbox/dropbox-sdk-python/pull/315))
* Bump actions/setup-python from v2.1.4 to v2.2.1 ([306](https://github.com/dropbox/dropbox-sdk-python/pull/306))
* Convert integration tests to use pytest instead of unittest ([313](https://github.com/dropbox/dropbox-sdk-python/pull/313))
* Add support for app authentication ([305](https://github.com/dropbox/dropbox-sdk-python/pull/305))
* Reorganize test directory ([312](https://github.com/dropbox/dropbox-sdk-python/pull/312))
* Fix CI matrix Python version ([311](https://github.com/dropbox/dropbox-sdk-python/pull/311))