In this release, json-parse-helpfulerror is not included by default anymore due to issues with WebPack #153.
That said, you can still configure lowdb to use it:
const low = require('lowdb')
const jph = require('json-parse-helpfulerror');
const db = low('db.json', {
format: {
stringify: JSON.stringify,
parse: jph.parse
}
})