Makes Assignments nullable in createpartitions RequestTopic (segmenti…

…o#758)

Add Transactionalmessage interface for request routing (segmentio#744)

* Add TransactionalMessage interface.

Add TransactionMessage interface so the Transport
automatically routes messages to Transaction Coordinators
if required.

Add Code of Conduct and Contribution Guidelines (segmentio#699)

* Add Code of Conduct and Contribution Guidelines

Add a full Code of Conduct and Code Contribution Guidelines document.
Provide description on how best to retrieve code, fork, checkout, and commit changes.

Fixes segmentio#688

* Update steps for git push

* Update based on PR comments

Removed several linkable sections in the Code of Conduct.
Update contributing to use kafka-go consistently.
Finished explaining how to replace the original version with forked version of the library.

* Update based on further feedback

* Adjust to follow the twilio-go code of contact

Preserve message order across batches. (segmentio#716)

* Preserve message order across batches.

Co-authored-by: Michael Graf <mikegraf000@gmail.com>

Only refresh metadata on success (segmentio#672) (segmentio#673)

* Only refresh metadata on success (segmentio#672)

Implements changes discussed and agreed in GitHub issue.

* Second draft solution to issue 672

* Create unit test to detect issue 672

* Check for nil event in test 672

Cache version specific encoders/decoders. (segmentio#652)

Fixes segmentio#651.

automatically discover first/last offset in client fetch requests (se…

…gmentio#638)

update to v2.6.0

update isTimeout and isTemporary to properly unwrap errors (segmentio…

…#616)

* update isTimeout and isTemporary to properly unwrap errors

* use interface instead