Upgrade packages that do not build with dune or cannot be used with opam-monorepo
These packages were not building with dune but their latest versions are:
- pure-splitmix.0.2 -> 0.3
- genspio.0.2 -> genspio.0.0.3
This package would not build properly in an opam-monorepo project because of a missing dune-project file:
- lwt-watcher.0.1 -> 0.2
Signed-off-by: Nathan Rebours nathan.p.rebours@gmail.com