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docs: note in Changelog that v3→v4 requires adding eslintConfig #10864

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docs: note in Changelog that v3→v4 requires adding eslintConfig #10864

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7 changes: 7 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -223,6 +223,13 @@ Like any major release, `[email protected]` contains a number of breaking chan

We've upgraded to ESLint 7 and added many new rules including some for Jest and React Testing Library as well as the `import/no-anonymous-default-export` rule. We've also upgraded `eslint-plugin-hooks` to version 4.0.0 and removed the `EXTEND_ESLINT` flag as it is no longer required to customize the ESLint config.

In particular, you'll need to add the following to `package.json` for ESLint to continue to work:
```js
"eslintConfig": {
"extends": ["react-app", "react-app/jest"]
},
```

### Jest

We've upgraded to Jest 26 and now set `resetMocks` to `true` by default in the Jest config.
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