Update Faraday Gem in 1.4.X

[andrewhood125]

Hi all!

Would you open to a PR against 1.4.X that bumps the Faraday dependency? I currently need to upgrade our app beyond Faraday 0.13

[mastermatt]

Duplicate of #373, #378, #382, #384, #385, and #397.
Basically, it's already been updated and will be included in the next release, however, they don't plan on releasing a v1.5 and instead are waiting until v2.0 is ready to go.

[pboling]

The major version bump is not primarily because we plan to break tons of things internally, though some minor changes might be breaking on some use cases, but rather because faraday is not (yet) following SemVer, and each minor release is breaking (usually), and as an important dependency we are bumping our major to call out that potential breaking change.

[pboling]

There is one internal breaking change so far. See https://github.com/oauth-xx/oauth2/blob/master/CHANGELOG.md#unreleased

[pboling]

Please help us get 2.0 out the door if you have any spare cycles. None of the core team are feeling much pain, so we are only working on it in our spare time.