Update uvicorn requirement from <=0.25.0 to <=0.29.0

Updates the requirements on [uvicorn](https://github.com/encode/uvicorn) to permit the latest version.
- [Release notes](https://github.com/encode/uvicorn/releases)
- [Changelog](https://github.com/encode/uvicorn/blob/master/CHANGELOG.md)
- [Commits](encode/uvicorn@0.0.1...0.29.0)

---
updated-dependencies:
- dependency-name: uvicorn
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

setup.py

@@ -81,7 +81,7 @@
  "service": [
  "fastapi>=0.55.1,<0.109",
  "httpx<1",
- "uvicorn<=0.25.0",
+ "uvicorn<=0.29.0",
  ],
  },
  entry_points={"console_scripts": ["apicast = apicast.cli:run"]},