Fix cargo aoc syntax

Bump criterion
Bump various libs
Add a graceful error message when metadata are missing

Cargo.toml

@@ -3,7 +3,9 @@ members = [
     "aoc-runner",
     "aoc-runner-derive",
     "aoc-runner-internal",
-    "cargo-aoc",
-    "examples"
+    "cargo-aoc"
+]
+exclude = [
+    "examples",
 ]
 resolver = "2"

aoc-runner-derive/Cargo.toml

@@ -10,7 +10,7 @@ repository = "https://github.com/gobanos/aoc-runner-derive"
 proc-macro = true
 
 [dependencies]
-syn = { version = "1.0.109", features = ["extra-traits"] }
+syn = { version = "2.0.39", features = ["extra-traits"] }
 quote = "1.0.33"
 proc-macro2 = "1.0.69"
 #aoc-runner-internal = { path = "../aoc-runner-internal" }

aoc-runner-derive/src/utils.rs

@@ -34,18 +34,14 @@ pub(crate) fn extract_result(ty: &syn::Type) -> Option<(SpecialType, syn::Type)>
         if let Some(p) = s.last() {
             if p.ident == "Result" {
                 if let PathArguments::AngleBracketed(a) = &p.arguments {
-                    if let Some(arg) = a.args.first() {
-                        if let GenericArgument::Type(t) = arg {
-                            return Some((SpecialType::Result, t.clone()));
-                        }
+                    if let Some(GenericArgument::Type(t)) = a.args.first() {
+                        return Some((SpecialType::Result, t.clone()));
                     }
                 }
             } else if p.ident == "Option" {
                 if let PathArguments::AngleBracketed(a) = &p.arguments {
-                    if let Some(arg) = a.args.first() {
-                        if let GenericArgument::Type(t) = arg {
-                            return Some((SpecialType::Option, t.clone()));
-                        }
+                    if let Some(GenericArgument::Type(t)) = a.args.first() {
+                        return Some((SpecialType::Option, t.clone()));
                     }
                 }
             }

cargo-aoc/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cargo-aoc"
-version = "0.3.4"
+version = "0.3.5"
 authors = ["Grégory Obanos <gregory.obanos@gmail.com>", "Olivier Pinon <oliv.pinon@gmail.com>"]
 description = "Cargo Advent of Code Helper"
 license = "MIT/Apache-2.0"
@@ -13,13 +13,11 @@ edition = "2021"
 [dependencies]
 #aoc-runner-internal = { path = "../aoc-runner-internal" }
 aoc-runner-internal = "0.1.0"
-toml = "0.5.11"
+toml = "0.8.8"
 chrono = "0.4.31"
 chrono-tz = "0.8.4"
 reqwest = { version = "0.11.22", features = ["blocking"] }
 webbrowser = "0.8.12"
-directories = "4.0.1"
+directories = "5.0.1"
 clap = { version = "4.4.8", features = ["derive"] }
 tokio = { version = "1.34.0", features = ["rt"] }
-
-