Set metadata before publishing

Author: powergee

Cargo.toml

@@ -2,6 +2,13 @@
 name = "circ"
 version = "0.1.0"
 edition = "2021"
+license = "MIT OR Apache-2.0"
+description = "Efficient referenced counted pointers for non-blocking concurrency"
+readme = "README.md"
+homepage = "https://github.com/kaist-cp/circ"
+repository = "https://github.com/kaist-cp/circ"
+keywords = ["atomic", "reference-counting", "non-blocking", "lock-free"]
+categories = ["concurrency", "memory-management"]
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html