* move `length` data type from `background-position` to `background-size`
This way it's backwards compatible with v3.
* sort data types
* update changelog
* make sure `length` is inferred later
Otherwise `bg-[120px]` would be inferred as `length` instead of
`position`.
In v3 this maps to `position` instead of `length`.
```css
.bg-\[120px\] {
background-position: 120px;
}
```
* add explicit test cases for `length` and `size` data types
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| @tailwindcss-postcss | ||
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| tailwindcss | ||
| tsconfig.base.json | ||