Update NPM

Steps to reproduce

This patch updates node and npm to the latest LTS version which [should
hopefully fix the package-lock.json problem](https://github.com/npm/cli/pull/76#issuecomment-448832714)
although this is hard to verify.

Worst case, we just upgraded npm.

Assignee

Lars Kiesow

Reporter

Lars Kiesow

Severity

Cosmetic Issue

Tags (folksonomy)

None

Components

Affects versions

Priority

Major
Configure