perf: build optimizations

[miracles1919]

[中文版模板 / Chinese template]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• TypeScript definition update
• Bundle size optimization
• Performance optimization
• Enhancement feature
• Internationalization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

#1898

💡 Background and solution

• build es 的时候不需要 presets
• tsconfig importHelpers: true，减少重复的 ts 辅助函数
• build cjs 的时候增加 plugin: @babel/plugin-transform-runtime，减少重复的 babel 辅助函数

---

看下效果

• es

优化后

• cjs

优化后

可以看到:

• var __rest = xxx 变成了 import tslib
• var __importDefault = xxx 变成了 require ('@babel/runtime/helpers/xxx')

📝 Changelog

Language	Changelog
🇺🇸 English	perf: build optimizations
🇨🇳 Chinese	构建产物优化

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

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