Move ESLint cache file into node_modules (facebook#9977)

Co-authored-by: Ian Schmitz <[email protected]>

Author: 2 people

packages/react-scripts/config/webpack.config.js

@@ -759,6 +759,10 @@ module.exports = function (webpackEnv) {
         eslintPath: require.resolve('eslint'),
         context: paths.appSrc,
         cache: true,
+        cacheLocation: path.resolve(
+          paths.appNodeModules,
+          '.cache/.eslintcache'
+        ),
         // ESLint class options
         cwd: paths.appPath,
         resolvePluginsRelativeTo: __dirname,