Use Rust 2018 edition

Cargo.toml

@@ -2,6 +2,7 @@
 name = "cargo-geiger"
 description = "Detects usage of unsafe Rust in your project and its dependencies."
 version = "0.4.2"
+edition = "2018"
 authors = ["anderejd <rajder@gmail.com>"]
 repository = "https://github.com/anderejd/cargo-geiger"
 readme = "README.md"

src/format/mod.rs

@@ -3,7 +3,7 @@ use cargo::core::PackageId;
 use std::error::Error;
 use std::fmt;
 
-use format::parse::{Parser, RawChunk};
+use self::parse::{Parser, RawChunk};
 
 mod parse;
 
@@ -60,16 +60,16 @@ impl<'a> fmt::Display for Display<'a> {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
         for chunk in &self.pattern.0 {
             match *chunk {
-                Chunk::Raw(ref s) => try!(fmt.write_str(s)),
-                Chunk::Package => try!(write!(fmt, "{}", self.package)),
+                Chunk::Raw(ref s) => (fmt.write_str(s))?,
+                Chunk::Package => (write!(fmt, "{}", self.package))?,
                 Chunk::License => {
                     if let Some(ref license) = self.metadata.license {
-                        try!(write!(fmt, "{}", license))
+                        (write!(fmt, "{}", license))?
                     }
                 }
                 Chunk::Repository => {
                     if let Some(ref repository) = self.metadata.repository {
-                        try!(write!(fmt, "{}", repository))
+                        (write!(fmt, "{}", repository))?
                     }
                 }
             }

src/lib.rs

@@ -12,6 +12,7 @@ extern crate structopt;
 extern crate syn;
 extern crate walkdir;
 
+use self::format::Pattern;
 use self::walkdir::DirEntry;
 use self::walkdir::WalkDir;
 use cargo::core::compiler::CompileMode;
@@ -32,7 +33,6 @@ use cargo::util::ProcessBuilder;
 use cargo::util::{self, important_paths, CargoResult, Cfg};
 use cargo::Config;
 use colored::*;
-use format::Pattern;
 use petgraph::graph::NodeIndex;
 use petgraph::visit::EdgeRef;
 use petgraph::EdgeDirection;