Add missing Cargo.toml fields

Signed-off-by: Jose Fernandez <[email protected]>

Author: jfernandez

Cargo.toml

@@ -4,6 +4,10 @@ version = "0.1.0"
 authors = ["Jose Fernandez <[email protected]>"]
 license = "LGPL-2.1-or-later"
 description = "Rust bindings for the Performance Metrics API (PMAPI)"
+repository = "https://github.com/jfernandez/pmapi-sys"
+readme = "README.md"
+keywords = ["pmapi", "performance", "metrics", "pcp", "bindings"]
+categories = ["external-ffi-bindings"]
 edition = "2021"
 publish = ["crates-io"]