missing dependencies with npm

[tykayn]

i just installed SARAH v4 on ubuntu 17.04 desktop.
node: v 7.10.1, npm 5.5.1

some plugins were missing in the package.json:
i had to run these to make SARAH run well
npm i --save require
npm i --save i18n
npm i --save ejs
npm i --save ejs-locals