v2.2.0: Trickle up fatal Braze errors as exceptions

The client library will trickle up fatal braze errors as exceptions. E.g. BrazeInternalServerError is an example of an internal server error.

These exceptions can be imported from braze.client like -

from braze.client import BrazeClientError, BrazeInternalServerError

Refer to #5 for more details on changes in this release.

v2.1.0: Merge pull request #8 from GoodRx/simpler-retries

Simplify API retries while obeying rate limits

Overhaul from initial fork

• AppboyClient --> BrazeClient
• Retries on network, rate limit and Braze internal server errors
• Black Auto Formatter added (run tox -e format)
• Updated to latest Braze connection mechanism