Include readme and licenses in crates.io archive

Fixes #772.

test_suite/Cargo.toml

@@ -2,13 +2,6 @@
 name = "serde_test_suite"
 version = "0.0.0"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
-license = "MIT/Apache-2.0"
-description = "A generic serialization/deserialization framework"
-homepage = "https://serde.rs"
-repository = "https://github.com/serde-rs/serde"
-documentation = "https://docs.serde.rs/serde/"
-readme = "README.md"
-keywords = ["serialization"]
 publish = false
 
 [features]