Sort package entries in Cargo.toml

Cargo.toml

@@ -2,19 +2,19 @@
 name = "proc-macro2"
 version = "1.0.42" # remember to update html_root_url
 authors = ["David Tolnay <dtolnay@gmail.com>", "Alex Crichton <alex@alexcrichton.com>"]
-license = "MIT OR Apache-2.0"
-readme = "README.md"
-keywords = ["macros"]
-repository = "https://github.com/dtolnay/proc-macro2"
-documentation = "https://docs.rs/proc-macro2"
-categories = ["development-tools::procedural-macro-helpers"]
-edition = "2018"
 autobenches = false
-rust-version = "1.31"
+categories = ["development-tools::procedural-macro-helpers"]
 description = """
 A substitute implementation of the compiler's `proc_macro` API to decouple
 token-based libraries from the procedural macro use case.
 """
+documentation = "https://docs.rs/proc-macro2"
+edition = "2018"
+keywords = ["macros"]
+license = "MIT OR Apache-2.0"
+readme = "README.md"
+repository = "https://github.com/dtolnay/proc-macro2"
+rust-version = "1.31"
 
 [package.metadata.docs.rs]
 rustc-args = ["--cfg", "procmacro2_semver_exempt"]