message: CHANGELOG 0.3.1 did not included the fix of the Field(u32)
diff: Tantivy 0.4.0
  ==========================
  -
  +- Raise the limit of number of fields (previously 256 fields)
  - Removed u32 fields. They are replaced by u64 and i64 fields (#65)
  - Replacing rustc_serialize by serde. Kudos to @KodrAus and @lnicola
  - QueryParser:
  @@ -13,7 +13,6 @@ Tantivy 0.3.1
  ==========================
  - Expose a method to trigger files garbage collection
  -- Raise the limit of number of fields (previously 256 fields)
  Tantivy 0.3
  