* Fixed `extractHeaderLink` for 45, to include both `next` and `previous`.
6.1.0
* Adds support for `Link` header (39)
6.0.0
* Added ability to do Guzzle sync and async requests through Promises. * `errors` now returns a boolean instead of an object. `body` now contains the error response.
5.5.0
* Added ability to use custom headers in REST calls.
5.4.0
* Added option to supply a PSR-compatible logger via `setLogger`.