v0.43

This release moves alert grid sorting logic from the UI to the backend to improve performance when large number of alerts is rendered.

Full changelog:

• #859 feat(project): move alert group sorting to the backend
• #864 chore(backend): upgrade go-gin-prometheus to the latest version
• #862 feat(api): compress response before putting it in the cache
• #858 fix(ui): cleanup scss variable imports
• #854 chore(ui): upgrade all 3rd party dependencies