Deprecate this package

[feross]

Let's deprecate this package and move the rules into eslint-config-standard.

See #20 (comment) for an explanation.

[grxy]

@feross Are you also considering deprecating eslint-config-standard-react and bringing that into eslint-config-standard as well?

[feross]

@grxy We can't bring in rules in eslint-config-standard-react which are React-specific because they cause problems for non-React users.