update to rust 2018

Cargo.toml

@@ -2,6 +2,7 @@
 name = "article_scraper"
 version = "0.1.0"
 authors = ["Jan Lukas Gernert <jangernert@gmail.com>"]
+edition = "2018"
 
 [dependencies]
 failure = "0.1"

src/article.rs

@@ -2,7 +2,7 @@ use std;
 use url::Url;
 use std::path::PathBuf;
 use chrono::NaiveDateTime;
-use error::{
+use crate::error::{
     ScraperError,
     ScraperErrorKind,
 };

src/lib.rs

@@ -19,7 +19,7 @@ mod error;
 mod article;
 pub mod images;
 
-use article::Article;
+use crate::article::Article;
 use libxml::parser::Parser;
 use libxml::xpath::Context;
 use libxml::tree::{
@@ -30,7 +30,7 @@ use std::path::PathBuf;
 use std::ops::Index;
 use failure::ResultExt;
 use std::error::Error;
-use config::{
+use crate::config::{
     GrabberConfig,
     ConfigCollection
 };
@@ -39,7 +39,7 @@ use encoding_rs::{
 };
 use chrono::NaiveDateTime;
 use std::str::FromStr;
-use images::ImageDownloader;
+use crate::images::ImageDownloader;
 use self::error::{
     ScraperError,
     ScraperErrorKind
@@ -686,7 +686,7 @@ impl ArticleScraper {
 
 #[cfg(test)]
 mod tests {
-    use ::*;
+    use crate::*;
     
     #[test]
     pub fn golem() {