Update podspec to allow static library.

[bridger]

Version 1.4.0 of Cocoapods allows a pod to be used as a static library, even in a Swift app. It requires the library's podspec to contain s.static_framework = true.

This little change works in my project.

I believe this will help apps launch faster. Here's a blog post that explains why too many dynamic frameworks slows down launch: https://blog.automatic.com/how-we-cut-our-ios-apps-launch-time-in-half-with-this-one-cool-trick-7aca2011e2ea

[smhk]

purely FWIW Josh, maybe soon you should consider dumping cocoapods support.

We've noticed more and more teams have given up and just use Carthage, and once swift package manager arrives I guess pods will be pretty dead.

your library is way too good for it :)