Add categories to Cargo.toml

BurntSushi / walkdir

Rust library for walking directories recursively.

The Unlicense

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Add categories to Cargo.toml #36

Closed KodrAus closed 7 years ago

KodrAus commented 7 years ago

Relevant API Guideline

Add some categories the Cargo.toml so walkdir has better discoverability on crates.io. Maybe add the filesystem category. I'm not sure if others might also be applicable, there's a list here