Update podspec on official specs repo

[jksk]

In order to use the latest version of this pod as a dependency of another pod, the podspec needs to be on the official repo: https://github.com/Cocoapods/Specs. Currently, it only knows about version 1.0:

-> JRSwizzle (1.0)
   one-stop-shop for all your method swizzling needs.
   pod 'JRSwizzle', '~> 1.0'
   - Homepage: https://github.com/rentzsch/jrswizzle
   - Source:   https://github.com/rentzsch/jrswizzle.git
   - Versions: 1.0 [master repo]

Updating the repo is done using trunk: https://guides.cocoapods.org/making/specs-and-specs-repo.html