diveRsity fails to load and thus causes the Docker container build to fail

[hlapp]

See the build log from a recent rebuild of the tag 0.1.1 (which has the package added): https://registry.hub.docker.com/u/hlapp/rpopgen/build_id/48281/code/b9x9fyfc6tief6qr8cr4auv/

Reverting this cures the problem (see rebuild of master after removing the package). See commit 4d177ba for the particular error message, which seems to have to do with the huge package, one of the dependencies of diveRsity.

cc @kkeenan02 - any thoughts for how to remedy the issue are welcome.