ENH: Add csv-diff and tsv-diff to topics so that it's shown via google

[corneliusroemer]

I searched for tsv-diff via Google and was led to this page where your tool doesn't actually show up. Maybe add csv-diff and tsv-diff as a topic to the repo metadata so it's more findable?

https://github.com/topics/tsv-diff

[corneliusroemer]

I again struggled to find this tool through topic search - would be great if you could fix this. Thanks!

[simonw]

Just did that, thanks for the suggestion.