Updated Cargo description

Author: James O'Cull

Cargo.toml

@@ -4,5 +4,5 @@ version = "0.2.0"
 authors = ["James O'Cull <[email protected]>"]
 documentation = "https://jocull.github.io/rust-measurements/"
 repository = "https://github.com/jocull/rust-measurements"
-description = "Handle metric, imperial, and other measurements with ease! Types: Length, Temperature"
+description = "Handle metric, imperial, and other measurements with ease! Types: Length, Temperature, Weight"
 license = "MIT"