Initial implementation #1
Uses EJSON as a library, and adds in KMS integration on top (same as EJSONWrapper), along with the env command from Shopify/ejson2env
Just to be clear, the code here is basically a fork of how things work in ejson/ejson2env (with the addition of the KMS stuff being the only "new" bit). Hence the use of certain libraries ejson uses (Convey, the cli tool etc).
Thanks for the reviews so far! Will take a look at addressing them today.