Bump filelock from 3.0.12 to 3.13.1

Bumps [filelock](https://github.com/tox-dev/py-filelock) from 3.0.12 to 3.13.1.
- [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@v3.0.12...3.13.1)

---
updated-dependencies:
- dependency-name: filelock
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

requirements-dev.txt

@@ -5,7 +5,7 @@ cfgv==3.2.0
 charset-normalizer==2.0.7
 coverage==4.5.4
 distlib==0.3.7
-filelock==3.12.2
+filelock==3.13.1
 flake8==3.5.0
 gibberish-detector==0.1.1
 identify==2.3.0