Update protobuf requirement from <5.28,>=3.13 to >=3.13,<5.29

Updates the requirements on [protobuf](https://github.com/protocolbuffers/protobuf) to permit the latest version.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v3.13.0...v5.28.0)

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

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

setup.py

@@ -28,7 +28,7 @@ def read(*parts):
 install_requires = [
     "click>=7.1,<8.2",
     "graphviz>=0.14,<0.21",
-    "protobuf>=3.13,<5.28"
+    "protobuf>=3.13,<5.29"
 ]
 
 setup_requires = [