Cargo.toml: Sort dependencies fields

Cargo.toml

@@ -16,24 +16,24 @@ repository = "https://github.com/rust-lang-nursery/mdBook"
 description = "Creates a book from markdown files"
 
 [dependencies]
-clap = "2.24"
 chrono = "0.4"
-handlebars = { version = "1.0", default-features = false, features = ["no_dir_source"] }
-serde = "1.0"
-serde_derive = "1.0"
+clap = "2.24"
+env_logger = "0.6"
 error-chain = "0.12"
-serde_json = "1.0"
-pulldown-cmark = "0.1.2"
+handlebars = { version = "1.0", default-features = false, features = ["no_dir_source"] }
+itertools = "0.8"
 lazy_static = "1.0"
 log = "0.4"
-env_logger = "0.6"
-toml = "0.4.8"
 memchr = "2.0"
 open = "1.1"
+pulldown-cmark = "0.1.2"
 regex = "1.0.0"
-tempfile = "3.0"
-itertools = "0.8"
+serde = "1.0"
+serde_derive = "1.0"
+serde_json = "1.0"
 shlex = "0.1"
+tempfile = "3.0"
+toml = "0.4.8"
 toml-query = "0.7"
 
 # Watch feature