eslint-config-wordpress is deprecated

[jayhill90]

Describe the bug
eslint-config-wordpress has been deprecated in favor of the official core packages @wordpress/eslint-plugin or @wordpress/scripts

To reproduce
Steps to reproduce the behavior:

1. Open package.json
2. Go to the NPM page for eslint-config-wordpress https://www.npmjs.com/package/eslint-config-wordpress
3. There's a deprecated notice.

Expected behavior
We should use the official Core configurations when possible.

Screenshots
N/A

System information (please complete)

• OS X
• Browser Chrome
• Version Latest

Additional context

I was just cruising through the package.json to see what all was included by default and looking up what each pacakge does and noticed the deprecated message for eslint-config-wordpress

[jayhill90]

FWIW I switched to @wordpress/scripts and got a message:

+ @wordpress/scripts@3.3.0
added 1354 packages from 713 contributors and audited 890144 packages in 78.885s
found 13000 high severity vulnerabilities
  run `npm audit fix` to fix them, or `npm audit` for details

So I'm not sure how we'd want to handle that, but it's all a dev dependency so maybe it's not as severe as NPM says?

[nickcernis]

We're using @wordpress/scripts in Genesis now and I'd be happy to use it in Sample too.

The WP core team periodically runs npm audit fix to fix those warnings, and they're dev dependencies too as you say, so I'm happy to continue down this path.