Function strikethrough

strikethrough(text: string): string
Apply strikethrough (SGR 9) to text.
Parameters
- text: string
Returns string
The input wrapped with \u001b[9m … \u001b[29m.
Remarks
Disable with SGR 29.
Example
```
strikethrough("deprecated");
```
See
- https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_(Select_Graphic_Rendition)
- applyAnsiStyle
- Defined in style.ts:138