Bump protoc_plugin from 21.1.2 to 22.0.0

Bumps [protoc_plugin](https://github.com/google/protobuf.dart) from 21.1.2 to 22.0.0.
- [Release notes](https://github.com/google/protobuf.dart/releases)
- [Commits](google/protobuf.dart@protoc_plugin-v21.1.2...protoc_plugin-v22.0.0)

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

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

Author: dependabot[bot]

pubspec.yaml

@@ -45,7 +45,7 @@ dev_dependencies:
   grinder: ^0.9.0
   node_preamble: ^2.0.2
   lints: ">=4.0.0 <6.0.0"
-  protoc_plugin: ^21.1.2
+  protoc_plugin: ">=21.1.2 <23.0.0"
   pub_api_client: ">=2.1.1 <4.0.0"
   pubspec_parse: ^1.3.0
   test: ^1.16.7