- Downgrade 'faraday' dependency to ~> 0.12
- Downgrade 'faraday_middleware' dependency to ~> 0
- Update 'json' dependency to ~> 2.1.0
- Update 'faraday' dependency to ~> 1.0
- Update 'faraday_middleware' dependency to ~> 1.0
- Update 'rake' dependency to ~> 11.0