Run cargo fix --edition to move to Edition 2018.

src/idle.rs

@@ -4,8 +4,8 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-use presence::PresencePayload;
-use date::DateTime;
+use crate::presence::PresencePayload;
+use crate::date::DateTime;
 
 generate_element!(
     /// Represents the last time the user interacted with their system.
@@ -23,7 +23,7 @@ mod tests {
     use super::*;
     use try_from::TryFrom;
     use minidom::Element;
-    use error::Error;
+    use crate::error::Error;
     use std::str::FromStr;
     use std::error::Error as StdError;