Version 3

[ota-meshi]

• Drop support for older versions of Node.js. (<18?)
• Drop support for older versions of ESLint. (<8?)
• Support for flat shareable configs. (Do we want to release it before the new version?)
• And more?

[JounQin]

I think eslint ^8 will work for a long time.

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Oh, just noticed you're talking about drop eslint <8.