lodash vulnerability

[justin-lyon]

rethinkdb-init has a dependency on an old version of lodash that has been flagged by npm audit.
See the advisory here https://www.npmjs.com/advisories/577

my local npm audit:

                       === npm audit security report ===


                                 Manual Review
             Some vulnerabilities require your attention to resolve

          Visit https://go.npm.me/audit-guide for additional guidance


  Low             Prototype Pollution

  Package         lodash

  Patched in      >=4.17.5

  Dependency of   rethinkdb-init

  Path            rethinkdb-init > lodash

  More info       https://nodesecurity.io/advisories/577

found 1 low severity vulnerability in 275 scanned packages
  1 vulnerability requires manual review. See the full report for details.

[eviltik]

@thejsj please :)