chore(deps): bump source_gen

Bumps the source_gen group in /packages/worker_bee/worker_bee_builder with 1 update: [source_gen](https://github.com/dart-lang/source_gen).


Updates `source_gen` from 1.5.0 to 2.0.0
- [Release notes](https://github.com/dart-lang/source_gen/releases)
- [Commits](dart-lang/source_gen@source_gen-v1.5.0...source_gen-v2.0.0)

---
updated-dependencies:
- dependency-name: source_gen
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: source_gen
...

Signed-off-by: dependabot[bot] <[email protected]>

packages/worker_bee/worker_bee_builder/pubspec.yaml

@@ -17,7 +17,7 @@ dependencies:
   dart_style: ^2.3.2
   meta: ^1.7.0
   path: ">=1.8.0 <2.0.0"
-  source_gen: ^1.3.2
+  source_gen: ">=1.3.2 <3.0.0"
   stream_channel: ^2.1.0
   tuple: ^2.0.0
   worker_bee: ">=0.3.3 <0.4.0"