hi guys, what's the deal with core.matrix vs neanderthal? can i (set-current-implementation :neanderthal) yet?

unrelatedly, i am writing a core.matrix implementation, following the [implementation guide](https://github.com/mikera/core.matrix/wiki/Implementation-Guide). i don't seem to be able to add the clojure.core.matrix.compliance-tester dependency. i'm using [net.mikera/core.matrix "0.57.0"]. is the implementation guide outdated?