Bump get_it from 8.2.0 to 9.2.1

[dependabot]

Bumps get_it from 8.2.0 to 9.2.1.

Changelog

Sourced from get_it's changelog.

[9.2.1] - 2026-02-19

• Added AI skill files in skills/ directory for AI coding assistants
• Added AI-Assisted Development section to README

[9.2.0] - 2025-12-03

• allReady() now caches its Future and returns the same instance on repeated calls
  • Cache is automatically invalidated when new async singletons are registered
  • This enables watch_it to detect when async registrations change (e.g., after pushNewScope)
• Fixed: pending async singletons now complete their ready completer when removed via unregister() or scope reset, allowing allReady() to complete properly

[9.1.1] - 2025-11-25

• Updated example project

[9.1.0] - 2025-11-20

• Added DevTools extension for visualizing and inspecting GetIt registrations
  • View all registered objects with their type, scope, registration mode, and state
  • See instance details via toString() output for created instances
  • Manual refresh button to update the registration list
  • Requires debugEventsEnabled = true to be set on GetIt instance
  • See README for setup instructions

[9.0.5] - 2025-01-12

• Use absolute GitHub URL for logo in README

[9.0.4] - 2025-01-12

• Fixed screenshots description to match working 9.0.1 format

[9.0.3] - 2025-01-12

• Fixed logo display on pub.dev by using relative path

[9.0.2] - 2025-01-12

• Fixed button sizing in README for pub.dev display

[9.0.1]

• Fixed linter error (missing trailing comma in test file)

[9.0.0] - BREAKING CHANGE

• BREAKING: Disposal order now always follows strict LIFO (Last-In-First-Out) based on registration order
  • Previously, disposal order was based on the order objects appeared in internal hash maps, which was unpredictable when mixing named and unnamed registrations
  • Now all disposals are sorted by registrationNumber (a sequential counter assigned during registration) ensuring true LIFO order

... (truncated)

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