v0.20.0

• Allow full snapshots to run when pg_stat_statements is not fully enabled
  • This provides for a smoother onboarding experience, as you can use the
    collector even if pg_stat_statements is not (yet) enabled through
    shared_preload_libraries
• RDS integration improvements
  • Don't attempt to connect to rdsadmin database
  • Accept rds_superuser as superuser for monitoring purposes
  • Correctly handle enhanced monitoring disk partitions
• Self-hosted system helper: Explicitly look for process called "postgres"
  • This avoids issues where there is another process that starts postgres
    and runs earlier than the actual postgres process