Test out categorical data feature from xgboost

[marco-c]

https://xgboost.readthedocs.io/en/latest/tutorials/categorical.html

[PromiseFru]

Hello @suhaibmujahid, it seems that this is a duplicate of https://github.com/mozilla/bugbug/issues/3817.

[suhaibmujahid]

it seems that this is a duplicate of #3817.

@PromiseFru thank you for reporting this!

@gothwalritu you may work on this issue instead of #3817 since this is the original one.

[gothwalritu]

Sure, thanks for letting me know :)