Faraday 1.0.0 came out a few days ago, but sentry-raven doesn't allow it in the gemspec.

I tried making a PR, but there are a handful of test failures with faraday 1.0.0 and I'm not sure how to fix them.

https://github.com/lostisland/faraday/blob/e346b8bdb46ee7f38ee5f9d519ad227a14de9612/CHANGELOG.md#v10