* add ssz rules
* regenerate protos to include deposit message
* built to match the deposit cli
* derived test
* fix up nil item
* fix up more nil items
* preston suggestion
* comment
* add missing tests to build file
* fix busted tests
Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
Co-authored-by: Preston Van Loon <preston@prysmaticlabs.com>
Co-authored-by: Victor Farazdagi <simple.square@gmail.com>
