Use older parameter to support 3.6.

Author: stephrdev

tox.ini

@@ -26,6 +26,6 @@ allowlist_externals =
 	sh
 skip_install = true
 commands =
-	poetry export --with dev --without-hashes -o {toxworkdir}/requirements.txt
+	poetry export --dev --without-hashes -o {toxworkdir}/requirements.txt
 	sh -c 'grep -v "^[dD]jango==" {toxworkdir}/requirements.txt | poetry run pip install --no-deps -r /dev/stdin'
 	pytest --isort --flake8 --black --cov