Cargo.toml: Sort key-value based on [fmt-rfcs][1]

[1]: https://github.com/rust-dev-tools/fmt-rfcs/blob/master/guide/cargo.md

Author: tesuji

Cargo.toml

@@ -1,24 +1,24 @@
 [package]
 name = "rustup"
 version = "1.18.2"
-edition = "2018"
 authors = [ "Diggory Blake <[email protected]>" ]
-description = "Manage multiple rust installations with ease"
+build = "build.rs"
 documentation = "https://rust-lang.github.io/rustup.rs/rustup/index.html"
+edition = "2018"
 homepage = "https://github.com/rust-lang/rustup.rs"
-repository = "https://github.com/rust-lang/rustup.rs"
-readme = "README.md"
 keywords = ["rustup", "multirust", "install", "proxy"]
 license = "MIT OR Apache-2.0"
-build = "build.rs"
+readme = "README.md"
+repository = "https://github.com/rust-lang/rustup.rs"
+description = "Manage multiple rust installations with ease"
 
 [features]
 default = ["curl-backend", "reqwest-backend"]
 curl-backend = ["download/curl-backend"]
-reqwest-backend = ["download/reqwest-backend"]
-vendored-openssl = ['openssl/vendored']
 # Include in the default set to disable self-update and uninstall.
 no-self-update = []
+reqwest-backend = ["download/reqwest-backend"]
+vendored-openssl = ['openssl/vendored']
 
 # Sorted by alphabetic order
 [dependencies]