Now it implements only HTTP.request method and works only in the legacy mode. So newest versions are not supported.
Install the libraries into the parent directory of the OpenFl project.
git clone https://github.com/jiveui/extensionkit
git clone https://github.com/jiveui/openfl-ios-networking
put the lines into the project.xml
<include path="../extensionkit" if="ios" />
<include path="../openfl-ios-networking" if="ios" />
That's it.