Update crate information

Author: febo

clients/rust/Cargo.toml

@@ -3,7 +3,9 @@ name = "limestone-client"
 version = "0.0.0"
 edition = "2021"
 readme = "README.md"
-license-file = "../../LICENSE"
+license = "Apache-2.0"
+authors = ["nifty-oss maintainers <[email protected]>"]
+repository = "https://github.com/nifty-oss/limestone"
 
 [features]
 test-sbf = []