deps: upgrade to npm 2.14.20
Hiiii
Bit late in the week, and on the coattails of 2.14.21, but here it is anyway! v2.14.20 of npm :)
Significant changes:
- upgrades
npm-install-checks
andnode-gyp
and flattens paths a little more -- let's see how this one goes, @TheAlphaNerd! - Some doc changes
Full release notes (including an explanation of the path length thing) are over at https://github.com/npm/npm/releases/tag/v2.14.20
r @iarna r @TheAlphaNerd r @Fishrock123 r @jasnell