Bump build_test from 2.2.3 to 3.0.0 in the pub group

Bumps the pub group with 1 update: [build_test](https://github.com/dart-lang/build).


Updates `build_test` from 2.2.3 to 3.0.0
- [Release notes](https://github.com/dart-lang/build/releases)
- [Commits](dart-lang/build@build_test-v2.2.3...build_test-v3.0.0)

---
updated-dependencies:
- dependency-name: build_test
  dependency-version: 3.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: pub
...

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

Author: dependabot[bot]

pubspec.yaml

@@ -17,7 +17,7 @@ dependencies:
 
 dev_dependencies:
   build_runner: ^2.3.3
-  build_test: ^2.2.1
+  build_test: ">=2.2.1 <4.0.0"
   build_web_compilers: '>=3.2.7 <5.0.0'
   mocktail: ^1.0.3
   remove_from_coverage: ^2.0.0