fix(deps): update dependency collection to v1.19.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
collection (source)	dependencies	minor	1.18.0 -> 1.19.1

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Warning

Some dependencies could not be looked up. Check the warning logs for more information.

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Release Notes

dart-lang/core (collection)

v1.19.1

Compare Source

• Move to dart-lang/core monorepo.

v1.19.0

Compare Source

• Adds shuffled to IterableExtension.
• Shuffle IterableExtension.sample results.
• Fix mergeSort when the runtime iterable generic is a subtype of the static
  generic.
• CanonicalizedMap: added constructor fromEntries.
• Mark "mixin" classes as mixin.
• extension IterableIterableExtension<T> on Iterable<Iterable<T>>
  • Add flattenedToList as a performance improvement over flattened.
  • Add flattenedToSet as new behavior for flattening to unique elements.
• Deprecate transitiveClosure. Consider using package:graphs.
• Deprecate whereNotNull() from IterableNullableExtension. Use nonNulls
  instead - this is an equivalent extension available in Dart core since
  version 3.0.
• Require Dart ^3.4.0

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## Walkthrough

依存関係のバージョンが更新され、`collection` パッケージが `1.18.0` から `1.19.0` に変更されました。この更新は、新機能やバグ修正を活用する意図を示しており、全体として依存関係を最新の状態に保つためのメンテナンス更新です。具体的な影響は詳細な変更内容が不明なため、確認できません。

## Changes

| ファイル                        | 変更の概要                         |
|-------------------------------|-----------------------------------|
| core/common/pubspec.yaml      | `collection` のバージョンを `1.18.0` から `1.19.0` に更新 |

## Poem

> 🐰 うさぎの喜び、今感じる  
> 新しいバージョン、心躍る  
> コレクションの改善、みんなに届け  
> ひらひらと舞う、コードの風景  
> 楽しみいっぱい、変化は素敵 🌼✨

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