How to update npm using npm itself in Win10/Openserver?

Question

Windows

Actually, the question is in the title.
There is an OpenServer. Installed node with npm. How to update it to the latest version?
You don't have to offer to go to the site and download, plz. I want it that way.
Now:
> npm -v
5.6.0
> npm view npm versions --json
...
"6.2.0-next.1"
]
> npm view npm version
6.1.0
Actually, npm install -g [email protected] on Windows does not helps
What to do to update?

Answer 1

npm install -g --production npm update