v0.4.0

Changes from v0.3.0 to v0.4.0

A lot of maintenance and some bug-fixing on this release:

Clicking on a violation gets "selected", this could be useful when there are several violations and you want to focus on just one.
Show a message when violations for a Constraint are unknown instead of saying that there are no violations.
Fixed double "Go back" button on logout message and better Info message style on Index when Authentication is enabled.
Updated all Python dependencies to the latest version.
A lot of work has been done to automate the SLC of the project (thanks @angelbarrera92!! 🎉 ):
- We have now automated E2E testing of the app against a Kubernetes cluster with Gatekeeper installed.
- Automatic dependencies update PRs from renovate bot.
- We have now an automated release notes generation
- Automated linting and format check for all languages

No breaking changes.