Upgrade json-schema to version 0.4.0 or later.

> yarn why json-schema
yarn why v1.22.10
[1/4] 🤔 Why do we have the module "json-schema"...?
[2/4] 🚚 Initialising dependency graph...
[3/4] 🔍 Finding dependency...
[4/4] 🚡 Calculating file sizes...
=> Found "json-schema@0.2.3"
info Reasons this module exists

• "nodesi#good-guy-http#request#http-signature#jsprim" depends on it