Update grpc requirement from ~> 1.48.0 to >= 1.48, < 1.57 (#8)

Updates the requirements on [grpc](https://github.com/google/grpc) to permit the latest version.
- [Release notes](https://github.com/google/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.48.0...v1.56.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     flow_client (0.2.3)
-      grpc (~> 1.48.0)
+      grpc (>= 1.48, < 1.57)
       grpc-tools (~> 1.48.0)
       json (~> 2.6.2)
       openssl (~> 3.0.0)
@@ -17,11 +17,11 @@ GEM
     docile (1.4.0)
     ffi (1.15.5)
     formatador (1.1.0)
-    google-protobuf (3.21.7)
-    googleapis-common-protos-types (1.4.0)
+    google-protobuf (3.23.3)
+    googleapis-common-protos-types (1.6.0)
       google-protobuf (~> 3.14)
-    grpc (1.48.0)
-      google-protobuf (~> 3.19)
+    grpc (1.56.0)
+      google-protobuf (~> 3.23)
       googleapis-common-protos-types (~> 1.0)
     grpc-tools (1.48.0)
     guard (2.18.0)

flow_client.gemspec

@@ -29,7 +29,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   # Uncomment to register a new dependency of your gem
-  spec.add_runtime_dependency "grpc", "~> 1.48.0"
+  spec.add_runtime_dependency "grpc", ">= 1.48", "< 1.57"
   spec.add_runtime_dependency "grpc-tools", "~> 1.48.0"
   spec.add_runtime_dependency "json", "~> 2.6.2"
   spec.add_runtime_dependency "openssl", "~> 3.0.0"