0.3.0

Prevent ExSentry itself from ever raising an exception due to user
input.


0.2.2

* Updated Timex and adjusted HTTPoison code. Thanks
  [@gshaw](https://github.com/gshaw)!

* Relaxed Poison version constraint.
  Thanks [@zacharydenton](https://github.com/zacharydenton)!

* Support `SENTRY_DSN` environment variable in `ExSentry.Client`.
  Thanks [@shiroyasha](https://github.com/shiroyasha)!


0.2.1

Last release as a single-programmer project.