Installation or How to use this?

[GeorgePadmore]

Kindly help with integrating this into my swift app. I tried duplicating everything as it is but I got an error in the CritterView.swift file on this line:
crossFade.fillMode = .forwards
Stating that "Type 'String' has no member 'forwards'"

Kindly assist in this error or how to integrate it in a swift app or install through a pod or cartfile. Thanks

[GeorgePadmore]

Solved. I got the solution after searching the internet. Find below the solution that worked for me.
.forwards is replaced with kCAFillModeForwards
and .easeIn is replaced with kCAMediaTimingFunctionEaseIn

Link to solution here