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

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

Change-Id: Ia96200aed9db3402f80b31ac22688ce73718c7b0

wikimedia/mediawiki-extensions-Disambiguator,wikimedia/mediawiki-extensions-Disambiguator