v0.14.0

• Introduce once-per-minute query statistics collection
  • Enabled for PostgreSQL 9.4+
  • This replaces the old logic for query stats without text (statement_text_frequency),
    and is always active
  • Statistics data gets sent with every full snapshot
• Backend counts: Support retrieving stats for Postgres 9.5 and older
• Log Insights: Add support for detecting aggressive vacuums (Postgres 11+)
• Parse serialization failure log events (U138 and U139)
• Have systemd restart the collector after crashes Dom Hutton #23