Commits on Nov 15, 2024

1. [Fix] ensure stable plugin reference with flat configs …

   The previous use of spread meant that
   ```ts
   import jsxA11y from 'eslint-plugin-jsx-a11y';
   
   jsxA11y !== jsxA11y.flatConfigs.recommended.plugins['jsx-a11y']
   ```
   
   This is a problem because if someone does something like this
   ```js
   import jsxA11y from 'eslint-plugin-jsx-a11y';
   
   export default [
     { plugins: { 'jsx-a11y': jsxA11y } },
     jsxA11y.flatConfigs.recommended,
   ];
   ```
   then ESLint will crash with the error `Config "jsx-a11y/recommended": Key "plugins": Cannot redefine plugin "jsx-a11y".`
   
   This PR fixes that by using `Object.assign` to mutate the `jsxA11y` object and maintain referential equality.

   

   bradzacher authored and ljharb committed Nov 15, 2024
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