Bump anyio from 3.7.1 to 4.0.0 (#816)

Bumps [anyio](https://github.com/agronholm/anyio) from 3.7.1 to 4.0.0.
- [Release notes](https://github.com/agronholm/anyio/releases)
- [Changelog](https://github.com/agronholm/anyio/blob/master/docs/versionhistory.rst)
- [Commits](agronholm/anyio@3.7.1...4.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Tom Christie <tom@tomchristie.com>

Author: dependabot[bot]

requirements.txt

@@ -16,7 +16,7 @@ build==1.0.3
 twine
 
 # Tests & Linting
-anyio==3.7.1
+anyio==4.0.0
 black==23.7.0
 coverage[toml]==7.3.0
 ruff==0.0.291