Dmitriy

Many differences between python and cython implementations. ``` aiokafka/record/_crecords/legacy_records.pyi:38: error: Class aiokafka.record._crecords.legacy_records.LegacyRecordBatch has abstract attributes "compression_type", "timestamp_type" [misc] aiokafka/record/_crecords/legacy_records.pyi:38: note: If it is meant to be abstract, add 'abc.ABCMeta' as...

https://github.com/aio-libs/aiokafka/blob/master/aiokafka/record/_crecords/default_records.pyx#L452 https://github.com/aio-libs/aiokafka/blob/master/aiokafka/record/_crecords/default_records.pyx#L459 differences from python

@ods please reopen this issue :)