Finished release 0.4.

Changelog.md

gso/api/v1/subscriptions.py

gso/auth/api_key_auth.py

gso/oss-params-example.json

gso/services/provisioning_proxy.py

gso/settings.py

gso/workflows/router/update_ibgp_mesh.py

setup.py

test/api/test_subscriptions.py

test/conftest.py