Bump types-cachetools from 0.1.8 to 0.1.9

Bumps [types-cachetools](https://github.com/python/typeshed) from 0.1.8 to 0.1.9.
- [Release notes](https://github.com/python/typeshed/releases)
- [Commits](https://github.com/python/typeshed/commits)

---
updated-dependencies:
- dependency-name: types-cachetools
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

requirements-dev.txt

@@ -19,7 +19,7 @@ isort==5.8.0
 nbconvert==6.0.7
 
 # mypy types
-types-cachetools==0.1.8
+types-cachetools==0.1.9
 types-filelock==0.1.4
 types-requests==0.1.13
 types-tabulate==0.1.1