Bump build_test from 2.2.3 to 3.5.4

Bumps [build_test](https://github.com/dart-lang/build) from 2.2.3 to 3.5.4.
- [Release notes](https://github.com/dart-lang/build/releases)
- [Commits](dart-lang/build@build_test-v2.2.3...build_test-v3.5.4)

---
updated-dependencies:
- dependency-name: build_test
  dependency-version: 3.5.4
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pubspec.yaml

@@ -14,7 +14,7 @@ dependencies:
 
 dev_dependencies:
   build_runner: ^2.2.1
-  build_test: ^2.1.2
+  build_test: ">=2.1.2 <4.0.0"
   build_web_compilers: '>=3.2.6 < 5.0.0'
   collection: ^1.15.0
   dependency_validator: ">=3.0.0 <6.0.0"