Fix tests by adding dependency constraint

We are currently having CI failures because there are some issues with
transitive dependencies. It is already fixed upstream but not release
yet.

We temporarily restrict chardet version to < 6 in tests to avoid these
warnings.

Signed-off-by: Leandro Lucarella <luca-frequenz@llucax.com>

Author: llucax

pyproject.toml

@@ -110,6 +110,9 @@ dev-pytest = [
   "cookiecutter == 2.6.0", # For checking the cookiecutter scripts
   "jinja2 == 3.1.6", # For checking the cookiecutter scripts
   "sybil >= 6.1.1, < 10", # Should be consistent with the extra-lint-examples dependency
+  # This is a hack to overcome an outdated version check in requests, see
+  # https://github.com/frequenz-floss/frequenz-repo-config-python/issues/527
+  "chardet < 6",
 ]
 dev = [
   "frequenz-repo-config[dev-mkdocs,dev-flake8,dev-formatting,dev-mkdocs,dev-mypy,dev-noxfile,dev-pylint,dev-pytest]",