chore(cargo): add homepage, update documentation fields

Author: seanmonstar

Cargo.toml

@@ -4,7 +4,8 @@ name = "hyper"
 version = "0.11.0-a.0"
 description = "A modern HTTP library."
 readme = "README.md"
-documentation = "http://hyperium.github.io/hyper"
+homepage = "https://hyper.rs"
+documentation = "https://docs.rs/hyper"
 repository = "https://github.com/hyperium/hyper"
 license = "MIT"
 authors = ["Sean McArthur <[email protected]>"]