fix: Add direct "setuptools" dependency

pyproject.toml

@@ -30,6 +30,7 @@ Documentation = "https://python-keycloak.readthedocs.io/en/latest/"
 
 [tool.poetry.dependencies]
 python = ">=3.7,<4.0"
+setuptools = "*"
 requests = ">=2.20.0"
 python-jose = ">=3.3.0"
 mock = {version = "^4.0.3", optional = true}