message: Update CHANGELOG with date range queries
diff: @@ -6,7 +6,7 @@ Tantivy 0.15.0
  - Added support for Option<TCollector>. (@fulmicoton)
  - DocAddress is now a struct (@scampi) #987
  - Bugfix consistent tie break handling in facet's topk (@hardikpnsp) #357
  -
  +- Date field support for range queries (@rihardsk) #516
  Tantivy 0.14.0
  =========================
  