forgotten package-lock.json

Merge pull request #78 from mapbox/danpat_node_14

Update NAN to support node 14.

* Add node 10 builds on travis

* Bump node-pre-gyp to ^0.12.0 to fix double rebuild bug
* Remove node 4 from the travis builds

v1.0.6

- Fixes compilation under Node 10

v1.0.3

Statically links against `libortools.a`

v1.0.2

Bumps upstream's or-tools package to v6.0 which should fix an issue in
the pickups and deliveries implementation resulting in segfaults.