refactor: 🆙 upgrade TypeScript to 4.0

[afc163]

https://devblogs.microsoft.com/typescript/announcing-typescript-4-0/

[中文版模板 / Chinese template]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style 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

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese

☑️ 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

[ant-design-bot]

[ant-design-bot]

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit 5b2473d:

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[codecov]

Codecov Report

Merging #26318 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #26318   +/-   ##
=======================================
  Coverage   99.56%   99.56%           
=======================================
  Files         374      374           
  Lines        7299     7299           
  Branches     2038     2031    -7     
=======================================
  Hits         7267     7267           
  Misses         32       32           

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[xrkffgg]

Emm 没有任何影响啊

[github-actions]

Size Change: 0 B

Total Size: 808 kB

ℹ️ View Unchanged

Filename	Size	Change
./dist/antd-with-locales.min.js	321 kB	0 B
./dist/antd.compact.min.css	65 kB	0 B
./dist/antd.dark.min.css	66.3 kB	0 B
./dist/antd.min.css	65 kB	0 B
./dist/antd.min.js	290 kB	0 B

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