Fixes a silent crash when ejecting

Author: gaearon

Diff for: packages/react-scripts/scripts/eject.js

@@ -100,12 +100,6 @@ prompt(
 
   const ownPackage = require(path.join(ownPath, 'package.json'));
   const appPackage = require(path.join(appPath, 'package.json'));
-  const babelConfig = JSON.parse(
-    fs.readFileSync(path.join(ownPath, '.babelrc'), 'utf8')
-  );
-  const eslintConfig = JSON.parse(
-    fs.readFileSync(path.join(ownPath, '.eslintrc'), 'utf8')
-  );
 
   console.log(cyan('Updating the dependencies'));
   const ownPackageName = ownPackage.name;
@@ -154,11 +148,15 @@ prompt(
 
   // Add Babel config
   console.log(`  Adding ${cyan('Babel')} preset`);
-  appPackage.babel = babelConfig;
+  appPackage.babel = {
+    presets: ['react-app'],
+  };
 
   // Add ESlint config
   console.log(`  Adding ${cyan('ESLint')} configuration`);
-  appPackage.eslintConfig = eslintConfig;
+  appPackage.eslintConfig = {
+    extends: 'react-app',
+  };
 
   fs.writeFileSync(
     path.join(appPath, 'package.json'),