Upgrade to latest Node 8/carbon from 8.11.3
nvm install lts/carbon --reinstall-packages-from=8.11.3Upgrade to latest LTS (which is lts/erbium -> v12.13.0 at the current moment)
nvm install lts/* --reinstall-packages-from=8.11.3NOTE: To show available lts, use nvm list.
Update npm
nvm install-latest-npmUpgrade Node and npm together
nvm install lts/* --reinstall-packages-from=default --latest-npmRemove old version
nvm uninstall 8.11.3