Add meta information to Cargo.toml

Author: davidsteiner

Cargo.toml

@@ -1,7 +1,11 @@
 [package]
 name = "ddtrace"
 version = "0.0.1"
+authors = ["David Steiner <david_j_steiner@yahoo.co.nz", "Fergus Strangways-Dixon <fergusdixon101@gmail.com>"]
 edition = "2021"
+license = "MIT"
+description = "utilities for integrating Datadog with tracing"
+readme = "README.md"
 
 [features]
 axum = ["dep:axum", "dep:axum-tracing-opentelemetry"]