add support for analyzer 9.0.0

[jlandon]

Description

This PR adds support for analyzer 9.0.0 in mobx_codegen by migrating from the deprecated Element2 API to the new Element API.

Changes

• Migrated all code generation logic from deprecated Element2 API to Element API
• Updated analyzer version constraint to ^9.0.0
• Updated mobx_codegen version to 2.7.5
• Updated CHANGELOG with migration details

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Pull Request Checklist

• If the changes are being made to code, ensure the version in pubspec.yaml is updated.
• Increment the major/minor/patch/patch-count, depending on the complexity of change
• Add the necessary unit tests to ensure the coverage does not drop
• Update the Changelog to include all changes made in this PR, organized by version
• Run the melos run set_version command from the root directory
• Include the necessary reviewers for the PR
• Update the docs if there are any API changes or additions to functionality

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.48%. Comparing base (7c34f5a) to head (ef89959).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1065      +/-   ##
==========================================
- Coverage   99.50%   99.48%   -0.03%     
==========================================
  Files          57       51       -6     
  Lines        2033     1934      -99     
==========================================
- Hits         2023     1924      -99     
  Misses         10       10              

Flag	Coverage Δ
flutter_mobx	?
mobx	99.28% <ø> (ø)
mobx_codegen	100.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
mobx_codegen/lib/src/mobx_codegen_base.dart	100.00% <100.00%> (ø)
mobx_codegen/lib/src/store_class_visitor.dart	100.00% <100.00%> (ø)
mobx_codegen/lib/src/template/method_override.dart	100.00% <100.00%> (ø)
mobx_codegen/lib/src/template/observable.dart	100.00% <100.00%> (ø)
mobx_codegen/lib/src/template/util.dart	100.00% <100.00%> (ø)
mobx_codegen/lib/src/type_names.dart	100.00% <100.00%> (ø)

... and 6 files with indirect coverage changes

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[Knupper]

@jlandon thanks for this pr, that solves a lot of problems.

[Copilot]

Pull request overview

This PR migrates mobx_codegen from the deprecated Element2 API to the new Element API to add support for analyzer 9.0.0. The migration updates the analyzer version constraint from < 9.0.0 to < 10.0.0 while maintaining backward compatibility with analyzer 7.4.0+.

Key Changes:

• Migrated all code from deprecated Element2 API to the new Element API
• Updated analyzer version constraint to support versions 9.x
• Updated package version from 2.7.4 to 2.7.5

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
mobx_codegen/pubspec.yaml	Updated analyzer version constraint to < 10.0.0 and bumped package version to 2.7.5
mobx_codegen/lib/version.dart	Updated version constant to match pubspec.yaml
mobx_codegen/CHANGELOG.md	Added version 2.7.5 entry documenting the analyzer 9.0.0 support
mobx_codegen/lib/src/type_names.dart	Migrated from Element2 to Element API including property names (name3→name, children2→children, etc.)
mobx_codegen/lib/src/template/util.dart	Updated method signatures and property access from Element2 to Element API
mobx_codegen/lib/src/template/observable.dart	Updated ExecutableElement2 to ExecutableElement and name3 to name
mobx_codegen/lib/src/template/method_override.dart	Migrated method parameter types and property names to Element API
mobx_codegen/lib/src/store_class_visitor.dart	Comprehensive migration of all Element2 types, property names (name3→name, metadata2→metadata), and method calls (accept2→accept, visitChildren2→visitChildren)
mobx_codegen/lib/src/mobx_codegen_base.dart	Updated ClassElement2 to ClassElement and visitor method calls
mobx_codegen/test/util_test.dart	Updated mock classes from MethodElement2 to MethodElement
mobx_codegen/test/store_class_visitor_test.dart	Updated mock implementations to use Element API with nullable name property

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[jlandon]

@amondnet I went ahead and added Copilot's recommendation (and also included ExtensionTypeElement) ✅

Let me know if the update looks good to you (24da0c8)

[amondnet]

@jlandon thanks

[amondnet]

@all-contributors please add @jlandon for code

[allcontributors]

@amondnet

I've put up a pull request to add @jlandon! 🎉