Bump tornado from 6.0.3 to 6.5.5 (#20)

Bumps [tornado](https://github.com/tornadoweb/tornado) from 6.0.3 to 6.5.5.
- [Changelog](https://github.com/tornadoweb/tornado/blob/master/docs/releases.rst)
- [Commits](tornadoweb/tornado@v6.0.3...v6.5.5)

---
updated-dependencies:
- dependency-name: tornado
  dependency-version: 6.5.5
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -65,7 +65,7 @@ sqlparse==0.3.0
 static3==0.7.0
 text-unidecode==1.3
 toml==0.10.0
-tornado==6.0.3
+tornado==6.5.5
 traitlets==4.3.3
 typed-ast==1.4.1
 urllib3==2.6.3