[Critical] Version Preprocessor Macro Crashes Cocoapods

I'm not sure this is even needed since cocoapods will generate this for you but the preprocessor macro you use to declare a string version number crashes Cocoapods.

See the issue here.
CocoaPods/CocoaPods#6296

[lukeredpath]

This is used when constructing the connection URL. I don't know what cocoapods generates but it's of no use as the library should not depend on cocoapods to work.

It may be possible to get this value at runtime instead of compile time but this has worked fine until now. Something must have changed in cocoapods parsing.