Joi extension to support array().ensure()
// import and assignment
const Joi = require('joi'); // use version <16.0.0
const joiEnsureArray = require('@wegolook/joi-ensure-array');
const myJoi = Joi.extend(joiEnsureArray);
// ...then
const result = myJoi.array().ensure().validate('value');
// => {err: null, value: ['value']}
// ...or
myJoi.array().ensure().validate(value, (err, value) => { /*...*/ });