Improve UX of yarn release

[lidel]

If package.json has:

"scripts": {
 "release": "aegir release"

and I run yarn release instead of npm run release it fails at the very last stage of publishing to NPM:

npm ERR! 401 Unauthorized - PUT https://registry.yarnpkg.com/is-ipfs - You must be logged in to publish packages.

I did not look at the URL and assumed i got logged out from NPM, to I've run npm login and then retried with yarn release, which failed again 🙃

I feel bit ashamed that it took me two retries to squint and see that its yarnpkg.com, but I suspect most of folks would do the same, so perhaps it worth addressing somehow?

Are we able to fix this so it just works under yarn?
If not, at least detect release runs under yarn and simply return error asking to run it via npm ?