doxa is a simple in-memory database, trying to copy the best solutions from `datascript`, `crux`, `fulcro`, `autonormal`, `kechema`, `shadow-grow` I finally finished something between poor man `diferential dataflow` and query caching. in the meantime, I also completely rewrote `datalog query` parsing and many other things. all using `meander` of course, just because I can 🙃 https://github.com/ribelo/doxa#caching--matching