* [swift] make some small improvements
* [swift][client] revert model to use allVars
* PostProcessModelProperty with allVars
* PostProcessModelProperty with vars
* [swift] improve objc interoperability
* [swift] fix swift4 for CI to pass
* [swift] improve objc interoperability
* [swift] improve objc interoperability
* Swift - try to fix build
* [swift] remove pods from git
* [swift] introduce result type as response library
* iOS - run petstore samples
* [swift4] add result sample to testing pipeline
* [swift] update docs with result type
* [swift] update result visibility
* [swift] update docs