We might need to drop support for old API versions in the future, so we need a way to verify that we're not attempting to talk to an incompatible version of the API.
Will be useful when user upgrades their XCS and we can throw and error telling them to upgrade their XcodeServerSDK version as well.
Actually, work for this is already done on a branch. I don't want to merge this until we add proper Xcode 7 support (which means fixing all these issues).
We might need to drop support for old API versions in the future, so we need a way to verify that we're not attempting to talk to an incompatible version of the API.
Will be useful when user upgrades their XCS and we can throw and error telling them to upgrade their XcodeServerSDK version as well.