fix(deps): update dependency dropdown_search to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
dropdown_search (source)	dependencies	major	5.0.6 -> 6.0.1

---

Release Notes

salim-lachdhaf/searchable_dropdown (dropdown_search)

v6.0.1

Compare Source

• New Feature:

  • add Semantics to searchBox to support voiceOver/TalkBack ...

• Fix bugs:

  • duplicated GlobalKey issue 672
  • multiSelection chips height issue 602
  • hint and dropdownBuilder issue 515

v6.0.0

• New features:

  • infinite list / lazy loading
  • add click properties to the dropdown
  • add custom mode
  • dropdown button can be changed depending on state (opened/closed)
  • add property cacheItems for popupProps
  • add property onItemLoaded
  • adding new properties for a lot of widget (scrollBar, modal, bottomSheet,...)
  • add to possibility to change position of clearButton and dropdownButton
    using direction property

• Breaking changes :

  • AsyncItems and items are replaced by items:(filter, infiniteScrollProps)
  • Add isDisabled to itemBuilder params
  • FavoriteItems renamed to SuggestedItems
  • isFilterOnline renamed to disableFilter
  • selectionWidget renamed to checkBoxBuilder
  • dropdownDecoratorProps renamed to decoratorProps
  • clearButtonProps and dropdownButtonProps are placed to suffixProps

• Fix bugs:

  • Search delay issue 542,
  • Multiselection triggers didChange
    issue 668,
  • ModalBottomSheet Keyboard
    issue 650,
  • ScrollBar padding top
    issue 512
  • Disabled color issue 553
  • MultiSelection overflow
    issue 526
  • Popup does not close after dropdown dispose
    issue 554
  • Suffix space issue 670

---

Configuration

📅 Schedule: Branch creation - "after 6pm every weekday,every weekend" in timezone Australia/Sydney, Automerge - "after 6pm every weekday,every weekend" in timezone Australia/Sydney.

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.