Release v2.2.0a0

What's Changed

Breaking changes

• Drop support for py38 by @unkcpz in #557
• Move optimade dependency as extra dependency by @unkcpz in #554
• Replace optimade-client with ipyoptimade by @unkcpz in #553

Dev

• Update dev dependencies by @unkcpz in #556
• Remove deprecated load_documentation_profile for doc build by @unkcpz in #555
• Add test to latest and oldest supported aiida-core by @unkcpz in #558
• Add Dependabot config for updating GHAs by @danielhollas in #560
• Bump the gha-dependencies group with 6 updates by @dependabot in #561
• Remove obsolete files by @danielhollas in #562
• Use Ruff by @danielhollas in #566
• CI: Add CODECOV_TOKEN secret by @danielhollas in #569
• New release workflow by @danielhollas in #570

New Contributors

• @dependabot made their first contribution in #561

Full Changelog: v2.1.0...v2.2.0a0