Update asyncpg requirement from >=0.25,<0.29 to >=0.25,<0.30

Updates the requirements on [asyncpg](https://github.com/MagicStack/asyncpg) to permit the latest version.
- [Release notes](https://github.com/MagicStack/asyncpg/releases)
- [Commits](MagicStack/asyncpg@v0.25.0...v0.29.0)

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

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

pyproject.toml

@@ -16,7 +16,7 @@ keywords = ["postgres", "postgresql", "asyncpg", "asyncio", "orm"]
 
 [tool.poetry.dependencies]
 python = "^3.8"
-asyncpg = ">=0.25,<0.29"
+asyncpg = ">=0.25,<0.30"
 pydantic = ">=1.9,<3.0"
 
 [tool.poetry.group.dev.dependencies]