Add basic Cargo metadata for top-crates

Author: shepmaster

top-crates/Cargo.toml

@@ -4,6 +4,10 @@ name = "rust-playground-top-crates"
 version = "0.1.0"
 edition = "2018"
 
+description = "Calculates what crates should be included in the playground"
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/integer32llc/rust-playground"
+
 [dependencies]
 cargo = "0.54.0"
 itertools = "0.10.0"