build: Updating lodash to 4.17.19
build: Updating lodash to 4.17.19

* https://npmjs.com/advisories/1523
* CVE-2019-10744

Change-Id: I3b17c27c8b1493875ce4930e86d5ff57bba8232a

wikimedia/mediawiki-extensions-Graph,wikimedia/mediawiki-extensions-Graph