Suppress the depreciation warnings from NPM

[canstudios-louisem]

Affected Area

Install and upgrade

Requested Feature

Suppress the depreciation warnings from NPM so that the cli is kept cleaner during install.

Use Case

There are a lot of unnnecary warning npm spits out. Some of our users struggle to tell the difference between these and error's or think they mean the project is stale.

Additional Information

I believe --loglevel error on the npm install's would fix this