Сообщения следующие, дословно:
npm WARN npm npm does not support Node.js v10.15.2
npm WARN npm You should probably upgrade to a newer version of node as we
can't make any promises that npm will this version.
Supported releases of Node.js are the latest release of 4,6,7,8,9.
You can find the latest version at https://nodejs.org/
checkPermissions Missing write access to /usr/local/lib
path /usr/local/lib.
Не знаю надо ли еще переписывать сообщение.