Please add the racket topic to this repo #203

Hi Matthew,
Please add the racket topic to this repo - I think others will be interested and this will help them find it at
https://github.com/topics/racket

https://help.github.com/en/articles/classifying-your-repository-with-topics

Hi Matthew, Please add the racket topic to this repo - I think others will be interested and this will help them find it at https://github.com/topics/racket https://help.github.com/en/articles/classifying-your-repository-with-topics

Done.

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Please add the racket topic to this repo #203