Add logicalType/decimal support to read bytes

[ralphschindler]

This PR adds support for (at least) reading streams topics that have a schema that includes an Avro byte type with logicalType = "decimal" to be able to decode it into a decimal (instead of returning the bytes in the resulting structure.

Outstanding questions:

• I would like to add a test, do I do that here?
• Do I need to add the same functionality to write_bytes()?

Reference for this implementation is here: https://avro.apache.org/docs/1.10.2/spec.html#Decimal

Thanks for your library and assistance!

[ralphschindler]

Hi @tPl0ch just pinging if there is any insight you have on this. Thanks again for maintaining this!

[stefankleff]

Thank you @ralphschindler for implementing this feature. We had the same need and will use your PR.
@tPl0ch It would be great if this could be merged.

[tPl0ch]

@stefankleff , could you test this on the dev-master branch after the merge before I release a new version? I currently don't have the necessary confidence in the testing / CI of this project?

[stefankleff]

@tPl0ch Thanks for merging and your overall effort!
We've forked the project and using it with the change for more two weeks now, and we don't have any issues.

[tPl0ch]

@stefankleff @ralphschindler released as https://github.com/flix-tech/avro-php/releases/tag/5.0.1

[ralphschindler]

Apologies for being silent, I am unsure why I didn't get notifications of communications on updates to this issue. In any case, thank you for merging! I'll be glad to assist in testing future PRs, I would just need a little direction. Thanks again!