Bump trustme from 0.8.0 to 0.9.0 (#402)

Bumps [trustme](https://github.com/python-trio/trustme) from 0.8.0 to 0.9.0.
- [Release notes](https://github.com/python-trio/trustme/releases)
- [Commits](python-trio/trustme@v0.8.0...v0.9.0)

---
updated-dependencies:
- dependency-name: trustme
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

@@ -36,5 +36,5 @@ pproxy==2.7.8
 pytest==6.2.5
 pytest-trio==0.7.0
 pytest-asyncio==0.15.1
-trustme==0.8.0
+trustme==0.9.0
 uvicorn==0.12.1; python_version < '3.7'