Bump sybil from 7.1.1 to 8.0.0

Bumps [sybil](https://github.com/simplistix/sybil) from 7.1.1 to 8.0.0.
- [Changelog](https://github.com/simplistix/sybil/blob/master/CHANGELOG.rst)
- [Commits](simplistix/sybil@7.1.1...8.0.0)

---
updated-dependencies:
- dependency-name: sybil
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pyproject.toml

@@ -69,7 +69,7 @@ optional-dependencies.dev = [
     "sphinx-copybutton==0.5.2",
     "sphinx-substitution-extensions==2024.8.6",
     "sphinxcontrib-spelling==8",
-    "sybil==7.1.1",
+    "sybil==8.0.0",
     "types-requests==2.32.0.20240914",
     "vulture==2.12",
     "vws-python-mock==2024.8.30",