update npm packages code example

Example 1: use npm to update packages to latest version

npm i -g npm-check-updates
ncu -u
npm install

Example 2: npm update

npm install -g npm@latest

Example 3: how to update my package.json

npm install -g npm-check-updates
/after install run following:
ncu -u

//Then this:
npm update

Example 4: npm update all

npm update --save

Example 5: update all dependencies npm

npm update  //update all local packages

Example 6: npm update syntax

npm update -g <package_name>