Relies on org.jetbrains.anko and jcenter

[watuLammini]

The current version (4.0.833) depends on the org.jetbrains.anko in version 0.10.8 which is (as far as I know) only hosted on jcenter.
Now the problem is, both jcenter has discontinued it's service (though the repo is still accessible read-only, there are no more updates and security concerns) and anko itself is discontinued. There are already known vulnerabilities, as you can see at mvnrepository.
So the easiest solution would probably be to stop using anko at all. Everything else works without jcenter I think.
I discovered this issue while trying to fix another bug, see #303.