Consider moving `authsome` and `validations` config to standalone modules
In the course of upgrading Joi to v13, something triggered an error in
RangeError: Maximum call stack size exceeded at Config.Object.<anonymous>.util.attachProtoDeep (node_modules/config/lib/config.js:1094:32)
The recommendation is that the app config should only contain settings that easily serialize to JSON.
pubsweet-validations-core) would make sense as modules that could be imported where needed?