Bump filelock from 3.13.1 to 3.20.3 (#664)

Bumps [filelock](https://github.com/tox-dev/py-filelock) from 3.13.1 to 3.20.3.
- [Release notes](https://github.com/tox-dev/py-filelock/releases)
- [Changelog](https://github.com/tox-dev/filelock/blob/main/docs/changelog.rst)
- [Commits](tox-dev/filelock@3.13.1...3.20.3)

---
updated-dependencies:
- dependency-name: filelock
  dependency-version: 3.20.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -24,7 +24,7 @@ cfgv==3.4.0
 charset-normalizer==3.3.2
 distlib==0.3.8
 docutils==0.20.1
-filelock==3.13.1
+filelock==3.20.3
 graphviz==0.20.1
 identify==2.5.33
 idna==3.7