feat: configurable toast

[helsonxiao]

First of all, thank you for your contribution! :-)

Please makes sure that these checkboxes are checked before submitting your PR, thank you!

• Make sure that you follow antd's code convention.
• Run npm run lint and fix those errors before submitting in order to keep consistent code style.
• Rebase before creating a PR to keep commit history clear.
• Add some descriptions and refer relative issues for you PR.

Extra checklist:

if isBugFix :

• Make sure that you add at least one unit test for the bug which you had fixed.

elif isNewFeature :

• Update API docs for the component.
• Update/Add demo to demonstrate new feature.
• Update TypeScript definition for the component.
• Add unit tests for the feature.

新增功能

#899

• defaultConfig，Toast 默认参数
• config 方法，用于自定义 Toast 的默认参数，建议在 App 启动后调用
• getConfig 方法，用于获取当前配置
• content 参数支持传入对象，向后兼容的同时，支持新的参数
  • stackable: 开启时，这条 Toast 会叠加在之前的 Toast 上；关闭时，弹出这条 Toast 前会清空其它 Toast。默认开启，建议开发者在生产环境下关闭，保证更好的用户体验。
• remove 方法，同 Portal.remove，对外隐藏 Portal 概念
• removeAll 方法，清空当前所有 Toast

Bug Fix

• 修复文档中“一次只允许一个 Toast”这个不正确的描述
• 将文档中未提及的 show API 标记为 deprecated
• 修复文档中对于 hide 的相关描述
• 修复文档中 duration 默认值是 3s，但代码中是 2s 的问题
• Switch 使用 trackColor，消除 RN 的警告⚠️

[helsonxiao]

在安卓上测试通过，维持默认颜色

[BANG88]

晚上我看看

[codecov]

Codecov Report

Merging #911 into master will decrease coverage by 0.24%.
The diff coverage is 15.68%.

@@            Coverage Diff             @@
##           master     #911      +/-   ##
==========================================
- Coverage   61.55%   61.31%   -0.25%     
==========================================
  Files         212      212              
  Lines        5002     5033      +31     
  Branches     1077     1080       +3     
==========================================
+ Hits         3079     3086       +7     
- Misses       1906     1930      +24     
  Partials       17       17              

Flag	Coverage Δ
#rn	61.31% <15.68%> (-0.25%)	⬇️

Impacted Files	Coverage Δ
components/switch/index.tsx	100.00% <ø> (ø)
components/toast/demo/basic.tsx	25.00% <10.52%> (-4.04%)	⬇️
components/toast/index.tsx	23.25% <18.75%> (+4.20%)	⬆️

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[BANG88]

这些 deprecated 加不加都行，旧的代码是改不了了。 不过加上也好，只是以后也不会说真的干掉只保留对象的方式.

😄

代码还是写的很棒的，谢谢。

[helsonxiao]

客气了，这阵子可能还会根据业务需要提一些 issue / pr 😁

[BANG88]

如果是急需的就尽快了，要准备发新版了。