clap update from 3.0.0-beta.2 to rc.3 renamed Args::about() to help()

See [#3075] (clap-rs/clap#3075)
and [CHANGELOG] (https://github.com/clap-rs/clap/blob/ee2d70f8ef40025beb2ef901e39119ed1f809533/CHANGELOG.md?plain=1#L109)

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "aoc-main"
 description = "A macro which defines a handful main for the Advent of Code"
-version = "0.3.0"
+version = "0.3.1"
 authors = ["Rémi Dupré <r.dupre@qwant.com>"]
 repository = "https://github.com/remi-dupre/aoc"
 license = "Apache-2.0"
@@ -15,7 +15,7 @@ bench = ["criterion"]
 
 [dependencies]
 attohttpc = { version = "0.16.0", default_features = false, features = ["tls"] }
-clap = { version = "3.0.0-beta.2", default_features = false, features = ["std"] }
+clap = { version = "3.0.0-rc.3", default_features = false, features = ["std"] }
 colored = "2.0.0"
 dirs = "3.0.1"
 

src/lib.rs

@@ -14,13 +14,13 @@ use clap::{App, Arg, ValueHint};
 pub fn args(year: u16) -> App<'static> {
     App::new(format!("Advent of Code {}", year))
         .author("Rémi D. <remi@dupre.io>")
-        .about("Main page of the event: https://adventofcode.com/")
+        .override_help("Main page of the event: https://adventofcode.com/")
         .arg(
             Arg::new("stdin")
                 .short('i')
                 .long("stdin")
                 .conflicts_with("file")
-                .about("Read input from stdin instead of downloading it"),
+                .help("Read input from stdin instead of downloading it"),
         )
         .arg(
             Arg::new("file")
@@ -29,28 +29,28 @@ pub fn args(year: u16) -> App<'static> {
                 .long("file")
                 .conflicts_with("stdin")
                 .value_hint(ValueHint::FilePath)
-                .about("Read input from file instead of downloading it"),
+                .help("Read input from file instead of downloading it"),
         )
         .arg(
             Arg::new("days")
                 .takes_value(true)
                 .short('d')
                 .long("day")
                 .value_name("day num")
-                .about("Days to execute. By default all implemented days will run"),
+                .help("Days to execute. By default all implemented days will run"),
         )
         .arg(
             Arg::new("bench")
                 .short('b')
                 .long("bench")
-                .about("Run criterion benchmarks"),
+                .help("Run criterion benchmarks"),
         )
         .arg(
             Arg::new("all")
                 .short('a')
                 .long("all")
                 .conflicts_with("days")
-                .about("Run all days"),
+                .help("Run all days"),
         )
 }