WIP: use compatibility for testing

[dominictarr]

patchbay includes a distribution of ssb-server. It uses a custom selection of modules and versions.
theirfore, it should run those modules tests, so that it's can detect when something breaks.

this uses a tool recently refactored out of ssb-server. I present this as a Work in Progress, because there where a few small problems

• patchbay runs inside electron, so native modules are built for the electron version which means that they don't run in node... currently i do npm rebuild before running the tests. that's not ideal.
• also, lots of things depend on ssb-server, which the script that resolved versions originally special-cased for ssb-server... am wondering if the dependency checking script is a little bit pedantic

what are your thoughts @christianbundy ?

[stale]

Is this still relevant? If so, what is blocking it? Is there anything you can do to help move it forward?