v2.4.0

What's Changed

• 支持开关 error overlay by @raychenfj in #161
• README 添加 Contributing 内容 by @nighca in #162
• 优化非典型使用场景（serve -e prod & generate -e dev）下的行为 by @nighca in #163

Full Changelog: v2.3.0...v2.4.0