2.0.0-rc.3

What's Changed

• Fix missing esmodule mark in cjs build by @huozhi in https://github.com/vercel/swr/pull/2251
• fix: pass null fetcher to middleware by @koba04 in https://github.com/vercel/swr/pull/2240

Full Changelog: https://github.com/vercel/swr/compare/2.0.0-rc.1...2.0.0-rc.3