0.8.0

Release notes

Enhancements

• Switched from anyhow::Error to custom dbn::Error for all public fallible functions
  and methods. This should make it easier to disambiguate between error types.
• EncodeDbn::encode_record and EncodeDbn::record_record_ref no longer treat a
  BrokenPipe error differently
• Added AsyncDbnDecoder
• Added pretty::Px and pretty::Ts newtypes to expose price and timestamp formatting
  logic outside of CSV and JSON encoding
• Added interning for Python strings
• Added rtype to encoded JSON and CSV to aid differeniating between different record types.
  This is particularly important when working with live data.
• Added pretty_ Python attributes for DBN price fields
• Added pretty_ Python attributes for DBN UTC timestamp fields

Breaking changes

• All fallible operations now return a dbn::Error instead of an anyhow::Error
• Updated serialization order to serialize ts_recv and ts_event first
• Moved header fields (rtype, publisher_id, instrument_id, and ts_event) to
  nested object under the key hd in JSON encoding to match structure definitions
• Changed JSON encoding of all 64-bit integers to strings to avoid loss of precision
• Updated MboMsg serialization order to serialize action, side, and channel_id
  earlier given their importance
• Updated Mbp1Msg, Mbp10Msg, and TradeMsg serialization order to serialize
  action, side, and depth earlier given their importance
• Updated InstrumentDefMsg serialization order to serialize raw_symbol,
  security_update_action, and instrument_class earlier given their importance
• Removed bool return value from EncodeDbn::encode_record and
  EncodeDbn::record_record_ref. These now return dbn::Result<()>.

Bug fixes

• Fixed handling of NUL byte when encoding DBN to CSV and JSON
• Fixed handling of broken pipe in dbn CLI tool