Bump npm from 6.10.3 to 6.11.3 (#3949)
Bump npm from 6.10.3 to 6.11.3 (#3949)

[npm 6.11.3 has been released](https://npm.community/t/release-6-11-3/9873/1) which fixes [the regression we've been seeing](https://npm.community/t/6-11-1-some-dependencies-are-no-longer-being-installed/9586/4).

Ref #3904
badges/shields,badges/shields,badges/shields