• API Changes. Using Range instead of (start, end) in the API and internals (FileSlice, OwnedBytes, Snippets, ...)
  This change is breaking but migration is trivial.
• Added an Histogram collector. (@fulmicoton) #994
• Added support for Option. (@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
• Added lz4-flex as the default compression scheme in tantivy (@PSeitz) #1009
• Renamed a lot of symbols to avoid all uppercasing on acronyms, as per new clippy recommendation. For instance, RAMDirectory -> RamDirectory. (@fulmicoton)
• Simplified positions index format (@fulmicoton) #1022
• Moved bitpacking to bitpacker subcrate and add BlockedBitpacker, which bitpacks blocks of 128 elements (@PSeitz) #1030
• Added support for more-like-this query in tantivy (@evanxg852000) #1011
• Added support for sorting an index, e.g presorting documents in an index by a timestamp field. This can heavily improve performance for certain scenarios, by utilizing the sorted data (Top-n optimizations)(@PSeitz). #1026
• Add iterator over documents in doc store (@PSeitz). #1044
• Fix log merge policy (@PSeitz). #1043
• Add detection to avoid small doc store blocks on merge (@PSeitz). #1054
• Make doc store compression dynamic (@PSeitz). #1060
• Switch to json for footer version handling (@PSeitz). #1060
• Updated TermMerger implementation to rely on the union feature of the FST (@scampi) #469
• Add boolean marking whether position is required in the query_terms API call (@fulmicoton). #1070