Update CocoaPod to 3.4.0

[kevincon]

It seems that if we want Cocoa Pods to respect our versioning from now on, we need to make a new release versioned 3.4.0 because I believe CocoaPods is seeing version 3.03 as version 3.3 (it's truncating the 0), so it thinks that our older release 3.03 is actually newer than our latest 3.1.1 release.

Therefore, in order to "get past it" we need to release version 3.4.0. I can take care of this in the next day or so. I mainly just need to:

• Update the podspec
• Update the README
• Tag the release
• Ask @gali8 to push the release to the CocoaPods spec repo

[kevincon]

Okay @gali8, I've updated everything to version 3.4.0 now. Can you push it to CocoaPods?

[gali8]

👍 done!