Update to 2018 edition.

Cargo.toml

@@ -9,6 +9,7 @@ keywords = ["humanize", "human", "parse", "format"]
 documentation = "https://endoli.github.io/humanize.rs"
 homepage = "https://github.com/endoli/humanize.rs"
 repository = "https://github.com/endoli/humanize.rs"
+edition = "2018"
 
 [dependencies]
 language-tags = "0.2.2"

src/boolean.rs

@@ -27,8 +27,8 @@
 //! * `"nope"`
 //! * `"off"`
 
-use language_tags::LanguageTag;
-use super::parser::Parse;
+use crate::Parse;
+use language_tags::{langtag, LanguageTag};
 
 impl Parse for bool {
     fn parse(text: &str, language: &LanguageTag) -> Option<bool> {
@@ -45,7 +45,8 @@ impl Parse for bool {
 
 #[cfg(test)]
 mod tests {
-    use {parse, parse_with_language};
+    use crate::{parse, parse_with_language};
+    use language_tags::langtag;
 
     #[test]
     fn basic() {

src/lib.rs

@@ -49,10 +49,7 @@
         unsafe_code, unstable_features,
         unused_import_braces, unused_qualifications)]
 
-#[macro_use]
-extern crate language_tags;
-
 pub mod boolean;
 mod parser;
 
-pub use parser::{parse, parse_with_language, Parse};
+pub use crate::parser::{parse, parse_with_language, Parse};