message: Set lerna concurrency to 1 only on CI
diff: @@ -13,10 +13,7 @@ const runCommand = require('./_runCommand');
  console.log(`Setting up Jest's development environment...`);
  const lerna = isWindows ? 'lerna.cmd' : 'lerna';
  -const lernaCmd = path.resolve(
  - __dirname,
  - '../node_modules/.bin/' + lerna
  -);
  -const args = 'bootstrap --concurrency=1';
  +const lernaCmd = path.resolve(__dirname, '../node_modules/.bin/' + lerna);
  +const args = process.env.CI ? 'bootstrap --concurrency=1' : 'bootstrap';
  runCommand(lernaCmd, args, path.resolve(__dirname, '..'));
  