Upgrade build to 4.0.0

[lume-code]

Upgraded various dependencies to their latest versions:

• Updated Dart SDK constraint from ">=3.8.0 <4.0.0" to ">=3.9.0 <4.0.0".
• Adjusted build dependency range to ">=4.0.0 <5.0.0".
• Updated gql_code_builder from version ^0.13.1 to ^0.15.1.
• Updated build_runner from version ^2.0.3 to ^2.9.0.
• Updated graphql from version ^5.2.0-beta.3 to ^5.2.2.

However, some tests fail. I’m not sure, but from on my understanding, it’s likely due to a formatting mismatch in more recent versions of gql_code_builder (double \n vs single \n).

Related to #404

Thanks @budde377

[Copilot]

Pull Request Overview

This PR upgrades the build system and dependencies to version 4.0.0, focusing on improving compatibility and performance. The changes include updating the Dart SDK constraint and several key dependencies to their latest stable versions.

• Updated build dependency from version 2.x to 4.x range
• Upgraded gql_code_builder, build_runner, and graphql packages to newer versions
• Updated Dart SDK minimum requirement from 3.8.0 to 3.9.0

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[joey-kb]

@budde377 , please take a look to this PR. Thank you in advance.

[budde377]

@lume-code Thanks for submitting this PR! As expected it looks like the changed formatting are breaking the tests.

Do you mind doing the following:

1. Switch the commented out lines in this file https://github.com/heftapp/graphql_codegen/blob/main/packages/graphql_codegen/test/builder_test.dart#L104-L105 - i.e. make the test overwrite the test file rather than create a new .expected file
2. Rerun tests
3. Change the changed lines back
4. Commit and push.

That should reformat all the tests.

[lume-code]

@budde377 Thanks for the tip. Done, and the tests are now passing.