feat: support options

[zombieJ]

提供一个 options 方法（可能名字不太好？），目前仅仅是将 options 直接转换成 ReactNode。v5 后再重整这块。

@afc163 @chenshuai2144

Update:
rename to items

[codecov]

Codecov Report

Merging #438 (eec3431) into master (5aeca9e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #438   +/-   ##
=======================================
  Coverage   99.84%   99.85%           
=======================================
  Files          25       25           
  Lines         652      673   +21     
  Branches      169      175    +6     
=======================================
+ Hits          651      672   +21     
  Misses          1        1           

Impacted Files	Coverage Δ
src/Divider.tsx	100.00% <ø> (ø)
src/MenuItem.tsx	100.00% <ø> (ø)
src/MenuItemGroup.tsx	100.00% <ø> (ø)
src/SubMenu/index.tsx	100.00% <ø> (ø)
src/Menu.tsx	100.00% <100.00%> (ø)
src/utils/nodeUtil.tsx	100.00% <100.00%> (ø)

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[yoyo837]

optionsMapper？

[zombieJ]

optionsMapper 是合意？

[yoyo837]

提供一个 options 方法（可能名字不太好？）

这个

[zombieJ]

嗯，我是指 Mapper 这个意思啦。它本质还是一个 list，mapper 的话更像是将什么映射的感觉。出于性能考虑，未来其实也不会推荐语法糖了。

[afc163]

items？