Update dependency textual to ^0.84.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
textual	^0.83.0 -> ^0.84.0

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Release Notes

Textualize/textual (textual)

### [`v0.84.0`](https://redirect.github.com/Textualize/textual/blob/HEAD/CHANGELOG.md#0840---2024-10-22) [Compare Source](https://redirect.github.com/Textualize/textual/compare/v0.83.0...v0.84.0) ##### Fixed - Fixed `RadioSet` not being scrollable [https://github.com/Textualize/textual/issues/5100](https://redirect.github.com/Textualize/textual/issues/5100) - Fixed infinite loop in TextArea [https://github.com/Textualize/textual/pull/5154](https://redirect.github.com/Textualize/textual/pull/5154) ##### Added - Added `background-tint` CSS rule [https://github.com/Textualize/textual/pull/5117](https://redirect.github.com/Textualize/textual/pull/5117) - Added `:first-of-type`, `:last-of-type`, `:odd`, and `:even` pseudo classes [https://github.com/Textualize/textual/pull/5139](https://redirect.github.com/Textualize/textual/pull/5139)

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