uk.co.deanwild.materialshowcaseview.AnimationFactory missing

[jeromeDms]

dear all
I've an Android project using your lib, it was compiling fine when importing com.github.deano2390:MaterialShowcaseView:1.1.0@aar

Now this repo seems unreachable, I updated to com.github.deano2390:MaterialShowcaseView:1.3.4

But I'm no longer able to compile, I get the following issue in CoachMarkView.java :

import uk.co.deanwild.materialshowcaseview.AnimationFactory; <-- Cannot resolve symbol 'AnimationFactory'

Any help would be greatly appreciated as I'm currently stuck on this.
Thanks
Jerome