Drop support of topic/partition for `topics` option

[dashbitco]

Drop support of topic/partition for `topics` option

[msaraiva]

@gabrielgiordan I'm not sure if passing a keyword list has ever worked. We certainly should only accept [binary()]. Thanks for reporting this.

[v0idpwn]

I may be wrong, but I think :brod_group_coordinator supports custom partition assignment through the assign_partitions/2 callback. BroadwayKafka currently doesn't let you configure that out of the box. I think that it should, as this seems like an important use-case.

[lud]

Hi,

Is there a way to configure broadway_kafka to listen to a single, known, partition? I can't find in the Broadway docs if Broadway can be used with distributed elixir. To me it looks like Broadway is not distributed, but in that case broadway_kafka must listen to a single partition when used in a cluster, am I right?