Bump md-editor-v3 from 4.20.2 to 4.21.0

[dependabot[bot]]

Bumps md-editor-v3 from 4.20.2 to 4.21.0.

Release notes

Sourced from md-editor-v3's releases.

v4.21.0

新增特性

• 🌟 导出通用组件NormalFooterToolbar。

重构

• ⭐️ 通过添加标签使输入符合ADA标准（#695）。
• ⭐️ 用完整形式替换一些缩写内容。

修复问题

• 🐞 移除代码中多余的引号（#694）。

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New Features

• 🌟 Export component NormalFooterToolbar.

Refactor

• ⭐️ Make Inputs ADA Compliant by adding Labels(#695).
• ⭐️ Replace some abbreviated content with its full form.

Fixed Bugs

• 🐞Remove excess quotes(#694).

v4.20.4

修复问题

• 🐞 显示工具栏描述时，图标没有居中显示（#682）（#691）。

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Fixed Bugs

• 🐞 When displaying toolbar text, the icons are not centered(#682)(#691).

v4.20.3

新增特性

• 🌟 只在需要时显示切换同步滚动按钮（#684）。

修复问题

• 🐞 无法使用ctrl+i和ctrl+u快捷键（#686）。
• 🐞 显示工具栏描述时，图标没有居中显示（#682）。

... (truncated)

Commits

• bb33bbe 4.21.0
• d818dab refactor: replace some abbreviated content with its full form
• d6a20d8 Merge pull request #695 from ikkysleepy/ada-compliance
• 1c9b006 Add Missing Labels
• 526a890 feat: export component NormalFooterToolbar
• 92956a8 Merge pull request #694 from King-hsw/develop
• ac66087 fix:代码块中的copy-button标签内多一个无效双引号
• 4c80645 4.20.4
• a5d5c2d refactor: when displaying toolbar text, the icons are not centered(#682)(#691)
• 08114de Revert "fix: when displaying toolbar text, the icons are not centered(#682)"
• Additional commits viewable in compare view

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