v0.0.20

• Added Validator Metadata to hold information from beacon (#314)
  • Improved update metadata flow
  • Improved validator status reporting
  • Added beacon node to exporter
• Fix unsafe access to map (#317)
• Badger - remove large prefetch size (#319)
• Updated grafana dashboards:
  • improved validator status in both dashboards
  • null values in validator dashboard
  • removed hardcoded images