Updated Podspec to pass Cocoapods validation

I pushed a Podspec to the Cocoapods trunk pointing to my fork. When this PR has been accepted and the tag v0.1.5.4 has been created I can push the Podspec contained here pointing at the original repo. Sorry for the mess but I could not figure out a better way to do this where I would be able to test if it works.

You can already now update your Podfile to
```
pod 'dyci'
```
and enjoy not having to download dyci every time you run `pod install`.

https://github.com/DyCI/dyci-main/issues/37