Summary:
Our OSS build was failing with the latest version of cocoapods(1.6.0). The reason was that the `post_install` script of adding a `SWIFT_VERSION` was not getting applied while building the project. So I added a `swift_version` in the YogaKit pod itself. So with this change we no longer need the `post_install` script to add `SWIFT_VERSION`.
I have also released a new version of YogaKit(1.10.0) on the CocoaPods. Usually the swift pods should specify the swift_version which is being used to develop it.Due to unknown reason, it was never mentioned in the podspec.
Reviewed By: jknoxville
Differential Revision: D13990363
fbshipit-source-id: 3c2f814765c03683fbedd17b3607ff0e6cdef566
697962359c