How To Upgrade Node.js To The Latest Version?

If you initially installed Node.js with Homebrew, run:

 brew update
 brew upgrade node
 npm update -g npm

Other Alternatives:
A convenient way to change versions is to use nvm:

 brew install nvm

To install the latest version of Node.js with nvm:

 nvm install node

Upgrading via NPM
You can use the simpler method via the terminal. Avoid using sudo unless you need to.

 sudo npm cache clean -f
 sudo npm install -g n

Then

 sudo n stable 

Or

 sudo n latest

After which you may opt to confirm the upgrade

 node -v