update most dependencies

Update everything except for Clap. The change from Clap 2 to 4 is
difficult and requires code changes. These updates are relatively
simple.

Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 name = "cargo-readme"
 version = "3.2.0"
+edition = "2021"
 authors = ["Livio Ribeiro <livioribeiro@outlook.com>"]
 description = "A cargo subcommand to generate README.md content from doc comments"
 repository = "https://github.com/webern/cargo-readme"
@@ -11,12 +12,11 @@ license = "MIT OR Apache-2.0"
 
 [dependencies]
 clap = "2.32"
-toml = "0.5"
-regex = "1.0"
-serde = "1.0"
-serde_derive = "1.0"
-percent-encoding = "2.1"
-lazy_static = "1.1"
+toml = "0.7"
+regex = "1"
+serde = { version = "1", features = ["derive"] }
+percent-encoding = "2"
+lazy_static = "1"
 
 [dev-dependencies]
 assert_cli = "0.6"

src/config/manifest.rs

@@ -1,5 +1,6 @@
 //! Read crate information from `Cargo.toml`
 
+use serde::Deserialize;
 use std::collections::BTreeMap;
 use std::fs::File;
 use std::io::Read;

src/config/project.rs

@@ -1,7 +1,7 @@
 use std::env;
 use std::path::{Path, PathBuf};
 
-use config::manifest::{Manifest, ManifestLib};
+use crate::config::manifest::{Manifest, ManifestLib};
 
 /// Get the project root from given path or defaults to current directory
 ///

src/lib.rs

@@ -142,15 +142,6 @@
 //! By default, `README.tpl` will be used as the template, but you can override it using the
 //! `--template` to choose a different template or `--no-template` to disable it.
 
-#[macro_use]
-extern crate serde_derive;
-#[macro_use]
-extern crate lazy_static;
-
-extern crate percent_encoding;
-extern crate regex;
-extern crate toml;
-
 mod config;
 mod readme;
 

src/main.rs

@@ -1,13 +1,10 @@
 //! Generate README.md from doc comments.
 
-#[macro_use]
 extern crate clap;
 
-extern crate cargo_readme;
-
 use std::io::{self, Write};
 
-use clap::{App, AppSettings, Arg, ArgMatches, SubCommand};
+use clap::{crate_version, App, AppSettings, Arg, ArgMatches, SubCommand};
 
 mod helper;
 

src/readme/mod.rs

@@ -5,7 +5,7 @@ mod extract;
 mod process;
 mod template;
 
-use config;
+use crate::config;
 
 /// Generates readme data from `source` file
 ///

src/readme/process.rs

@@ -4,9 +4,9 @@
 //! - "```", "```no_run", "```ignore" and "```should_panic" are converted to "```rust"
 //! - markdown heading are indentend to be one level lower, so the crate name is at the top level
 
-use std::iter::{IntoIterator, Iterator};
-
+use lazy_static::lazy_static;
 use regex::Regex;
+use std::iter::{IntoIterator, Iterator};
 
 lazy_static! {
     // Is this code block rust?

src/readme/template.rs

@@ -1,4 +1,4 @@
-use config::Manifest;
+use crate::config::Manifest;
 
 /// Renders the template
 ///

tests/alternate-input.rs

@@ -1,5 +1,3 @@
-extern crate assert_cli;
-
 use assert_cli::Assert;
 
 #[test]

tests/alternate-template.rs

@@ -1,5 +1,3 @@
-extern crate assert_cli;
-
 use assert_cli::Assert;
 
 const EXPECTED: &str = r#"

tests/append-license.rs

@@ -1,5 +1,3 @@
-extern crate assert_cli;
-
 use assert_cli::Assert;
 
 const EXPECTED: &str = r#"

tests/badges.rs

@@ -1,5 +1,3 @@
-extern crate assert_cli;
-
 use assert_cli::Assert;
 
 const EXPECTED: &str = r#"

tests/default-behavior.rs

@@ -1,5 +1,3 @@
-extern crate assert_cli;
-
 use assert_cli::Assert;
 
 const EXPECTED: &str = r#"

tests/entrypoint-resolution.rs

@@ -1,5 +1,3 @@
-extern crate assert_cli;
-
 use assert_cli::Assert;
 
 #[test]

tests/multiline-doc.rs

@@ -1,5 +1,3 @@
-extern crate assert_cli;
-
 use assert_cli::Assert;
 
 const EXPECTED: &str = r#"

tests/multiple-bin-fail.rs

@@ -1,5 +1,3 @@
-extern crate assert_cli;
-
 use assert_cli::Assert;
 
 const EXPECTED: &str = "Error: Multiple binaries found, choose one: [src/entry1.rs, src/entry2.rs]";

tests/no-entrypoint-fail.rs

@@ -1,5 +1,3 @@
-extern crate assert_cli;
-
 use assert_cli::Assert;
 
 const EXPECTED: &str = "Error: No entrypoint found";

tests/no-template.rs

@@ -1,5 +1,3 @@
-extern crate assert_cli;
-
 use assert_cli::Assert;
 
 const EXPECTED: &str = r#"

tests/project-with-version.rs

@@ -1,5 +1,3 @@
-extern crate assert_cli;
-
 use assert_cli::Assert;
 
 const EXPECTED: &str = "# project-with-version