Update grpcio requirement from ~1.54 to >=1.54,<1.57 (#27)

Updates the requirements on [grpcio](https://github.com/grpc/grpc) to permit the latest version.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.54.0...v1.56.0)

---
updated-dependencies:
- dependency-name: grpcio
  dependency-type: direct:production
...

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Author: dependabot[bot]

pyproject.toml

@@ -23,7 +23,7 @@ classifiers = [
 [tool.poetry.dependencies]
 python = "~3.11"
 protobuf = "~4.23"
-grpcio = "~1.54"
+grpcio = ">=1.54,<1.57"
 grpcio-tools = "~1.54"
 jsonpickle = "~3.0"
 pymitter = "~0.4"